33rd week of 2009 patent applcation highlights part 27 |
Patent application number | Title | Published |
20090201920 | Enhancing voice QoS over unmanaged bandwidth limited packet network - An improved telephony adapter compresses voice data, creates IP packets, and prioritizes the voice IP packets over the data IP packets. Preferably, the compression and packetization interval is such that the bandwidth occupied by the voice IP packets is approximately half of the minimum average available bandwidth in the upstream direction, thereby maintaining acceptable latency and voice quality of the speech. Further enhancement is achieved by causing the ISP to also give priority to voice packets that are destined to the telephony adapter, over the data packets that are destined to the telephony adapter. | 2009-08-13 |
20090201921 | WIDE AREA COMMUNICATION NETWORKING - A communications network is disclosed and includes a broadband communication line having a first derived voice channel and a second derived voice channel, wherein the first and second derived voice channels are established as a function of an available bandwidth associated with the broadband communication line. The communication network further includes a residential gateway in communication with the broadband communication line. The residential gateway includes a switch, a network interface device in communication with the switch, and wherein the switch is configured to select at least one of the first or second derived voice channels for voice communication over the broadband communication line as a function of the available bandwidth. | 2009-08-13 |
20090201922 | METHOD FOR CHANGING SESSION MEDIA, METHOD FOR ESTABLISHING A CALL, AND EQUIPMENT THEREOF - A method for changing ICS session media includes: receiving a media type change request including a new media type sent from a terminal equipment or a MSC, releasing a CS call leg based on an original media type between an ICCF and the terminal equipment, establishing a CS call leg based on the new media type between the ICCF and the terminal equipment, and updating a media type of a second call leg between the ICCF and a second party into the new media type; or, receiving a media type change request including a new media type sent from a second party, updating a media type of a second call leg between an ICCF and the second party into the new media type, releasing a CS call leg based on an original media type between the ICCF and a terminal equipment, and establishing a CS call leg based on the new media type between the ICCF and the terminal equipment. | 2009-08-13 |
20090201923 | APPARATUS AND METHOD FOR A FAULT-TOLERANT SCALABLE SWITCH FABRIC WITH QUALITY-OF-SERVICE (QOS) SUPPORT - Embodiments of the present invention relate to portions of a switch fabric having a single logical stage and at least one physical stage. In addition, the data paths and the control paths of the switch fabric can be decoupled thereby allowing additional processing to be performed than would otherwise be the case with control rates that matched the high data rates. In other words, data cells received on high speed links can be spread over many lower speed links; consequently, the data cells can transit the switch fabric at that high speed while the control information associated with the data can be processed at that lower speed. Because the control information can be processed at a lower speed (associated with the control path), the control information can be processed over a greater period of time. | 2009-08-13 |
20090201924 | SYSTEM AND METHOD FOR SQUELCHING A RECOVERED CLOCK IN AN ETHERNET NETWORK - A system and method for squelching a recovered clock in an Ethernet network. In one embodiment the invention provides a method for squelching a recovered clock in an Ethernet network comprising a local node coupled to a remote node by a link, the method including receiving a descrambler status signal, receiving a remote receiver status signal, receiving a link status signal, and squelching the recovered clock signal based on the descrambler status signal, the remote receiver status signal, and the link status signal. | 2009-08-13 |
20090201925 | Apparatus and method for setting routing path between routers in chip - An apparatus and a method for setting a routing path in System-on-a-Chip (SoC) having an n×n net topology-based structure comprising a plurality of intellectual properties (IPs), each with a unique address, and a plurality of switches forming one-to-one correspondence to the IPs, to transmit and receive data between the IPs by using at least one of the switches. Accordingly, an orthogonal code having orthogonality is assigned according to the direction of transmission of each data (that is, output port). Then, an output port where the data is transmitted is determined, and the data is spread based on an orthogonal code assigned to the output ports of the at least one of the switches. | 2009-08-13 |
20090201926 | FIBRE CHANNEL PROCESSING BY A HOST CHANNEL ADAPTER - A method for data storage includes mapping a queue pair (QP) of a channel adapter to a specified Fibre Channel (FC) exchange for communication with a storage device. Upon receiving at the channel adapter from a host computer a storage command directed to the storage device, the storage command is executed by transmitting data packets over a switched network from the channel adapter to the storage device using the specified exchange and performing a remote direct memory access (RDMA) operation on the channel adapter using the mapped QP. | 2009-08-13 |
20090201927 | SYSTEM AND METHOD FOR COMMUNICATING USING A MULTISERVER PLATFORM - Aspects of the invention include receiving a first packet from a first of a plurality of blade servers at a first data rate and determining a second blade server that may receive the first packet. Data responsive to the received first packet may be transferred to the second blade server at a negotiated first data rate. A second packet comprising at least a portion of the first received packet may be transferred to the second blade server at the negotiated data rate. At least a portion of the first received packet may be transferred to at least the second blade server via a common bus. In another aspect of the invention, at least a third packet may be received from a network at a second data rate. Data responsive to the third packet may be transferred to at least a third blade server at a newly negotiated data rate. | 2009-08-13 |
20090201928 | Methods for reliable multicasting in local peer group (LPG) based vehicle ad hoc networks - A method for routing a multicast message comprising the steps of receiving a multicast message including at least a message, a source identifier, a sequence number, a time-to-live value and a multicast group destination, determining if the multicast group destination is in a multicast forwarding table, determining if the message has been previously received, adding the multicast message to the multicast forwarding table if it is determined that the multicast message has not been previously received, determining if a node that received the multicast message is a forwarding node; randomly setting a wait time for forwarding the multicast message; and forwarding the multicast message at the expiration of the wait time. | 2009-08-13 |
20090201929 | SYSTEM AND METHOD FOR SWITCHING FROM A UNICAST TO A MULTICAST DATA TRANSMISSION SESSION - A communications system and method provide a seamless switch from a first session to a plurality of multicast sessions. A server transmits data over both a first session and alternatingly between a plurality of synchronized multicast sessions. At predetermined time intervals, the server stops transmitting data over the currently active multicast session and starts transmitting over an idle multicast session. The server is further responsive to a request to stop transmitting the data over the first session at a time when the server alternates transmission between the multicast sessions. The time intervals are advantageously sufficient to allow a receiver to join an idle multicast channel and to send a request to stop the data transmission over the first session. | 2009-08-13 |
20090201930 | SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR IMPROVED DISTRIBUTION OF DATA - A method for improved distribution of data in a computing environment includes receiving data for distribution in the computing environment, receiving configuration data of the computing environment, parsing the data for distribution using the configuration data, and outputting header information of a packet, the packet including the data for distribution. | 2009-08-13 |
20090201931 | Method and apparatus for transferring IP transmission session - A method for transferring an IP transmission session is disclosed, including the following: a transmission session is created between the first node and second node based on a single IP protocol; the first node and second node obtain a transferable address pair by exchanging the session transfer management signaling; the transferable address pair is checked for bidirectional reachability; the transferable address pair is available if reachable in both directions, or is not available if unreachable in either direction; and the transmission session is transferred through the available transferable address pair. An apparatus for transferring an IP transmission session is also disclosed. Through the technical solution under the present disclosure, a session can be transferred in a network where IPv4 coexists with IPv6 without substantially affecting continuity of the end-to-end transmission session, thus fulfilling the requirements in the transition period during which IPv4 coexists with IPv6. | 2009-08-13 |
20090201932 | METHOD AND SYSTEM FOR IMPLEMENTING MPLS NETWORK DIFFSERV TRAFFIC ENGINEERING - A method for implementing DS-TE in MPLS network is disclosed. The method includes carrying Quality of Service (QoS) parameters relating to resource allocation in a path message when establishing an LSP; reserving bandwidth resource for service traffic according to the QoS parameters; using the reserved bandwidth to forward service traffic after the LSP is established. A system for implementing DE-TE in the MPLS network is also disclosed. The system includes an Ingress LSR, a relay LSR and a Egress LSR. The Ingress LSR or the relay LSR carry QoS parameters relating to the resource allocation in the path message for establishing LSR. The relay LSR reserves bandwidth resource for service traffic based on the QoS parameters and forwards the service traffic based on the reserved bandwidth when receiving the service traffic, after the LSP is established. An LSR is further disclosed according to the present invention. According to the method, system and LSR of the present invention, bandwidth resources can be allocated based on different service class and thus granularity for the DiffServ traffic engineering is further refined. | 2009-08-13 |
20090201933 | METHOD, DEVICE AND SYSTEM FOR SIGNALING TRANSFER - The embodiments of the present invention disclose a signaling transfer method and device for transferring signaling. The method includes: creating, by a signaling transfer device, address mapping table according to address information carried in a registration message upon receipt of the registration message; and determining a match with the address mapping table and transferring signaling. The device includes: a signaling reception element adapted to receive signaling including a registration message and a call message; an address mapping table creation element adapted to create address mapping table according to address information carried in the registration message; and a signaling transfer element adapted to transfer the signaling according to the address mapping table. | 2009-08-13 |
20090201934 | SPOOF CHECKING WITHIN A LABEL SWITCHING COMPUTER NETWORK - A label switching router (LSR) is described that spoof checks Multi-protocol Label Switching (MPLS) packets to prevent malicious or inadvertent injection of MPLS packets within a label switched path (LSP). The LSR ensures that MPLS packets received from an upstream label switching router (LSR) contain labels that were advertised to that upstream LSR. A software module associated with a signaling protocol, such as the Resource Reservation Protocol (RSVP), the Label Distribution Protocol (LDP), or the Border Gateway Protocol (BGP), is extended to utilize an MPLS forwarding table, and MPLS interface table, and a remote autonomous system table. A set of interfaces for which the label was advertised may be checked to determine whether an interface on which a packet was received is contained in the set of interfaces. The MPLS forwarding table may contain a spoof-check field used to specify one of several different types of spoof checks and to specify the set of interfaces. | 2009-08-13 |
20090201935 | SYSTEM AND METHOD FOR PARSING AND ALLOCATING A PLURALITY OF PACKETS TO PROCESSOR CORE THREADS - An apparatus and method are provided for allocating a plurality of packets to different processor threads. In operation, a plurality of packets are parsed to gather packet information. Additionally, a parse operation is performed utilizing the packet information to generate a key, and a hash algorithm is performed on this key to produce a hash. Further, the packets are allocated to different processor threads, utilizing the hash or the key. | 2009-08-13 |
20090201936 | Time synchronizing device and process and associated products - The present invention concerns a time synchronizing device and process, and a local gateway comprising that device. The time synchronizing device synchronizes a router arranged between two communication networks. It comprises intercepting means of a message coming from an apparatus of a source network for that message, having a specific time clock, and directed to a target network for that message, preparing means of a time request able to be executed in that apparatus so as to cause synchronizing data based on that specific clock to be obtained from that apparatus and to be transmitted back to the synchronizing device, sending means of the time request to the apparatus, forwarding means of the intercepted message to the target network after the preparing means have prepared the time request, receiving means of the synchronizing data, and exploiting means of those data to synchronize a local time clock used by the router with respect to that specific time clock. Application to home networks. | 2009-08-13 |
20090201937 | RESILIENT PROVIDER LINK STATE BRIDGING (PLSB) VIRTUAL PRIVATE LAN SERVICE (VPLS) INTERWORKING - A method of peer interfacing a Link-State controlled network domain with an Ethernet Bridging controlled network domain. A pair of peer attachment points are provided between the Link-State controlled network domain and the Ethernet Bridging domain. The peer attachment points are respective endpoints of a set of one or more LAN segments defined within the Ethernet Bridging domain. The set of LAN segments are represented as a virtual node in the Link-State controlled network domain. The virtual node is represented in the Link-State controlled network domain as connected to each of the peer attachment points via a respective virtual link. The virtual links are configured such that frames to or from an address in the Link-State controlled network domain are forwarded over a tree passing through only one of the peer attachments points. | 2009-08-13 |
20090201938 | ACCESS POINT AND METHOD FOR OPERATING THE ACCESS POINT - An access point is connectable to a first network and a second network different from the first network. The access point includes: a communication control device configured to connect one or more first terminals on the first network to the second network; and a communication stop device configured to deactivate at least a part of the communication control device when a condition on a time length or a time is fulfilled, such that at least one target terminal of the one or more first terminals is disconnected from the second network. | 2009-08-13 |
20090201939 | DATA COMMUNICATION APPARATUS, METHOD FOR ITS NETWORK CONFIGURATION, AND COMPUTER READABLE RECORDING MEDIUM STORING ITS PROGRAM - A transmission apparatus for participating in a virtual network constructed on a physical IP network, said transmission apparatus including: a node link monitoring unit configured to search an in-subnetwork node, which is a virtual network node existing within a first IP subnetwork that the transmission apparatus belongs to; a gatenode link monitoring unit configured to search an in-subnetwork gatenode, which is a virtual network gatenode existing within the IP subnetwork, wherein the in-subnetwork gatenode is linked to an out-subnetwork node that exists within a second IP subnetwork different from the first IP subnetwork; a detecting unit configured to detect a number of in-subnetwork gatenodes that exist within the first IP subnetwork; and a node link processing unit configured to determine whether a node linked to the transmission apparatus is an out-subnetwork gatenode based on the number of in-subnetwork gatenodes existing within the first IP subnetwork. | 2009-08-13 |
20090201940 | METHOD, SYSTEM AND GATEWAY FOR NEGOTIATING THE CAPABILITY OF DATA SIGNAL DETECTOR - Methods and systems for negotiating the capability of a data signal detector include a sender gateway sending a first signaling containing data signal detector support capability message during voice band data transmission ( | 2009-08-13 |
20090201941 | METHOD, SYSTEM, AND NETWORK ENTITY FOR OBTAINING SESSION DESCRIPTION PROTOCOL CAPABILITY INFORMATION - A method, system, network entity for obtaining Session Description Protocol capability information are disclosed. The method, system and network entity are used to solve the problem that a communication party is unable to acquire the Session Description Protocol capability information of the other party with the existing technology. The technical solutions according to the present invention allow a communication party to obtain the Session Description Protocol capability information of the other party from the other party by interacting messages between the two communication parties. Especially, in the case of H. 248 protocol, by extending the corresponding property parameters, a media gateway controller can obtain the Session Description Protocol capability information of the media gateway from the media gateway easily. | 2009-08-13 |
20090201942 | METHOD AND APPARATUS FOR MARKING AND SCHEDULING PACKETS FOR TRANSMISSION - A method and system for profile-marking and scheduling of packets are disclosed. Using a dual-rate scheduler, the profile state of a packet being scheduled for transmission by a flow traffic descriptor is determined based on the traffic rate of the flow traffic descriptor, which is associated with the queue that the packet belongs to. The profile state of the packet is marked prior to the transmission of the packet. | 2009-08-13 |
20090201943 | METHOD FOR TRANSFERRING TEST MESSAGES AND NETWORK ELEMENT DEVICE - A method for transferring test messages includes a Network Element (NE) A and NE B negotiating and determining a logical channel type. The Link Management Protocol (LMP) entity of NE A constructs a test message packet which includes the local Ethernet data interface ID, and transfers the test message packet to the local packet control module. The packet control module of NE A encapsulates the test message packet according to the logical channel type determined through negotiation, and transfers the encapsulated packet to the local transmitting interface. The receiving interface of NE B identifies and receives the packet. The packet control module of NE B obtains the packet from the local receiving interface and then encapsulates the packet. Next the packet control module of NE B transfers the test message packet obtained after decapsulation to the local LMP entity. Therefore, the test message can be transferred on the Ethernet data interface, and the auto discovery of the Ethernet physical link of the NE device succeeds once the test message is transferred successfully. | 2009-08-13 |
20090201944 | Controlling External Communication of Embedded Device Using Proxy Server - An embedded device communicates with another device via an external proxy server acting for the embedded device to control communication. The embedded device includes a communication device capable of communicating with the proxy server, a storage unit storing a state of communication with the other device, an updating unit, a response unit responding to the task with a result of the updating of the communication state that has been performed in accordance with the control request, and a control instruction unit transmitting, to the proxy server by means of the communication device, an instruction for changing a state of communication with the other device in the proxy server to the communication state stored in the storage. | 2009-08-13 |
20090201945 | Method, system, and computer program product for data exchange - A method, system, and computer program product are disclosed for exchanging data among data processing systems. The method may comprise transmitting a first data structure from an originating system in the format native to such system to a management component; identifying a target system for receiving the first data structure; transmitting the first data structure from the management component to an autonomous component as a function of the target system; and comparing the first data structure to a set of data templates in order to identify a matching data template. If a matching data template is identified, the method further may comprise generating a second data structure according to the matching data template in the format native to the target system. If no matching data template is identified, the method further may comprise generating a new data template and generating the second data structure according to the new data template. | 2009-08-13 |
20090201946 | DYNAMIC DSL LINE BANDWIDTH MANAGEMENT WITH THE SUBSCRIBER'S CONSENT - A system and method for allocating bandwidth to a plurality of subscriber devices operably connected to a DSL subscription network is described. An embodiment according to the invention comprises a bandwidth management system that operably connects a service network to a plurality of subscriber devices attached to a LAN. After allocating bandwidth to the plurality of subscriber services based on requirements determined from information provided by the service provider and the plurality of subscriber devices, the bandwidth management system can borrow bandwidth from non-critical subscriber services to meet the increased bandwidth requirement of other subscriber services in accordance to the subscriber's instructions. On completion of the subscriber services requiring the increased bandwidth, the bandwidth management system can reallocate bandwidth in accordance with the requirements determined from information provided by the service provider and the plurality of subscriber devices. | 2009-08-13 |
20090201947 | Method And Arrangement For Reducing The Amount Of Messages Sent In A Communication Network - The invention relates to a method and an arrangement for reducing the amount of messages sent in a communication network comprising a first communication network entity ( | 2009-08-13 |
20090201948 | METHODS AND APPARATUS FOR FORMATTING HEADERS IN A COMMUNICATION FRAME - Methods and apparatus for formatting headers for data packets within a communication frame for use in a wireless communication system are presented. Formatting headers includes determining the size of a wireless communication frame, and formatting the payloads and associated headers within the communication frame according to the determined size. This formatting includes placing headers at the beginning of the frame before the data packets corresponding to the headers to optimize processing of the headers at a receiver. Formatting may also include formatting the headers according to a first format within the frame when the determined frame size is below a predetermined size to optimize the size of the headers, and formatting according to a second format within the frame size of the data packet is equal to or greater than the predetermined size to optimize processing for frames having large data packets. | 2009-08-13 |
20090201949 | Information Processing Apparatus And Method, And Program - The present invention relates to an information processing device and method, and program, whereby unnecessary standby time can be reduced in depacketizing processing, and processing can be performed easily and at high speed. A common header creating unit | 2009-08-13 |
20090201950 | BAND LIMITING METHOD AND WIRELESS COMMUNICATION SYSTEM - A receiver estimates a channel quality. A transmitter amplifies a signal by a gain proportional to a difference between a required signal-to-noise power ratio and channel quality information, which is an estimation result of the channel quality, and transmits the signal so that the receiver can obtain the signal-to-noise power ratio. In this case, the receiver or the transmitter determines a roll-off rate of an adaptive filter based on the channel quality information. The transmitter uses the adaptive filter of the determined roll-off rate to filter and transmit the signal. | 2009-08-13 |
20090201951 | METHOD AND ADJUSTING TRANSMISSION TIMING AND TRANSMITTING CONTINUOUS PACKETS AND MOBILE STATION THEREOF - A method of adjusting transmission timing, a method of continuously transmitting packets, and a mobile station are provided. The method of adjusting the transmission timing includes adjusting the transmission timing according to a transmission timing adjustment command when the transmission timing adjustment command is received from a receiving side; and creating a cyclic prefix (CP) in consideration of a part of a CP of a next symbol which overlaps with a previous symbol on a time axis on the basis of the adjusted transmission timing. Accordingly, it is possible to prevent deterioration in reception performance and minimize reception complexity even when packet transmission timing is adjusted at a transmitting side using an OFDMA or analogous radio access scheme. | 2009-08-13 |
20090201952 | Method and apparatus for producing UV laser from all-solid-state system - An all-solid-state laser system produces coherent DUV radiation through a third or fourth harmonic generation. The fundamental wavelength is generated by a slave laser optically pumped by one or more light source(s) of high density array(s) and is stabilized by injecting optical seeds whose wavelength is rapidly swept to cover the fundamental wavelength. The pump effects are enhanced by a pump chamber that recycles unabsorbed pump light. The present invention enables DUV pulses with a width shorter than 1 ns and a repetition rate higher than 100 kHz. The output DUV wavelength is adjustable by selecting an appropriate seeder. | 2009-08-13 |
20090201953 | MICROSTRUCTURED OPTICAL FIBERS AND MANUFACTURING METHODS THEREOF - Optical devices and a method for manufacturing these devices. One optical device includes a core region having a first medium of a first refractive index n | 2009-08-13 |
20090201954 | METHOD AND APPARATUS FOR PULSED HARMONIC ULTRAVIOLET LASERS - An apparatus for producing coherent, pulsed ultraviolet light with pulse durations that range between 1 ps and 1 μs includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more FC stages, at least one of the one or more FC stages including a nonlinear FC device and one or more optical elements. The optical elements include a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component. The FC device includes a huntite-type aluminum double borate nonlinear optical material configured to produce FC light having a wavelength between 190 and 350 nm and a composition given by RAl | 2009-08-13 |
20090201955 | ILLUMINATION APPARATUS AND METHOD FOR CONTROLLING ENERGY OF A LASER SOURCE - The disclosure relates to an illuminating apparatus for illuminating a sample on a work stage, optionally with a relatively narrow illuminating line of relatively controlled energy, as well as methods for controlling energy of a laser source when illuminating a sample on a work stage with a relatively narrow illuminating line. | 2009-08-13 |
20090201956 | LIGHT SOURCE DRIVING APPARATUS AND LIGHT SOURCE DRIVING METHOD - A light source driving apparatus, which adjusts a bias current to be supplied so as to control intensity of a light source, comprises a power source which outputs a variable reference voltage; a light receiving unit which receives light output from the light source and converts the light into an electric signal; a bias supply unit which supplies a bias current, which is based on an intensity control signal according to the electric signal converted by the light receiving unit and the reference voltage output from the power source, to the light source; and a voltage control unit which acquires information about intensity characteristics with respect to the intensity control signal of the light source and controls the reference voltage according to the acquired information about the intensity characteristics. | 2009-08-13 |
20090201957 | Laser - A pulsed laser is disclosed comprising an active lasing medium ( | 2009-08-13 |
20090201958 | Lateral optically pumped surface-emitting semiconductor laser on a heat sink - A surface emitting semiconductor laser device comprising at least one surface emitting semiconductor laser ( | 2009-08-13 |
20090201959 | Wavelength and Intensity Monitoring of Optical Cavity - According to various illustrative embodiments, a device, method, and system for measuring optical fine structure of lateral modes of an optical cavity are described. In one aspect, the device comprises at least one photodetector arranged to detect an output of the optical cavity in a lateral direction thereof. The device also comprises an analyzer coupled to an output of the at least one photodetector and arranged to analyze at least a portion of signals produced in the at least one photodetector by at least a portion of the lateral modes of the optical cavity. The device also comprises a processor arranged to determine the optical fine structure of the at least the portion of the lateral modes of the optical cavity based on an output of the analyzer. | 2009-08-13 |
20090201960 | THREE-DIMENSIONAL PHOTONIC CRYSTAL LIGHT EMITTING DEVICE - The three-dimensional photonic crystal light emitting device includes a three-dimensional photonic crystal, and a defect forming a resonator in the three-dimensional photonic crystal. In the three-dimensional photonic crystal, an N-cladding layer formed of an N-type semiconductor, an active layer disposed inside the resonator, a P-cladding layer formed of a P-type semiconductor, a tunnel junction layer, and a first N-conductive layer formed of a first N-type conductor are arranged in this order. Electric conductivity of the first N-type conductor is higher than that of the P-type semiconductor. The light emitting device achieves high carrier injection efficiency and a high optical confinement effect. | 2009-08-13 |
20090201961 | Semiconductor Laser Element and Method of Fabrication Thereof - An AlGaAs-based ridge-stripe semiconductor laser element that has a stacked structure. The stacked structure includes a multi layer upper cladding layer, a multi layer lower cladding layer, and an active layer in-between the upper cladding layer and the lower cladding layers. The layers within each of the upper cladding layer and the lower cladding layer have different Al compositional ratios and refractive indexes. | 2009-08-13 |
20090201962 | SEMICONDUCTOR LASER DEVICE - A semiconductor laser device | 2009-08-13 |
20090201963 | VERTICAL-CAVITY SURFACE-EMITTING LASER, MODULE, OPTICAL TRANSMISSION DEVICE, FREE SPACE OPTICAL COMMUNICATION DEVICE, OPTICAL TRANSMISSION SYSTEM, AND FREE SPACE OPTICAL COMMUNICATION SYSTEM - Provided is a VCSEL that includes: a first semiconductor multilayer film reflective mirror of a first conductivity type formed on a substrate; an active region formed thereon; a current confining layer of a second conductivity type formed thereon; a second semiconductor multilayer film reflective mirror of the second conductivity type formed thereon; and a third semiconductor multilayer film reflective mirror of the second conductivity type formed thereon. The reflective mirrors include a pair of a high refractive index layer and a low refractive index layer. The impurity concentration of the second reflective mirror is higher than that of the third reflective mirror. The band gap energy of the high refractive index layer in the second reflective mirror is greater than the energy of the wavelength of a resonator formed of the first reflective mirror, the active region, the current confining layer, the second reflective mirror, and the third reflective mirror. | 2009-08-13 |
20090201964 | Semiconductor laser optical integrated semiconductor device - A semiconductor laser is a distributed feedback semiconductor laser in which the lasing wavelength can be changed, and includes a semiconductor substrate and a semiconductor layer portion provided on the substrate and including first and second active layers and an intermediate layer that optically couples the first active layer and the second active layer. The first active layer, the intermediate layer, and the second active layer are arranged in that order in a predetermined axis direction. The semiconductor laser further includes a diffraction grating that is optically coupled with the first and second active layers of the semiconductor layer portion, a first electrode and a second electrode for injecting carriers into the first active layer and the second active layer, respectively, and a third electrode for supplying the intermediate layer with a current. The grating extends in the predetermined axis direction and has a period that is uniform in the predetermined axis direction. | 2009-08-13 |
20090201965 | VERTICAL-CAVITY SURFACE-EMITTING LASER, MODULE, OPTICAL TRANSMISSION DEVICE, OPTICAL TRANSMISSION SYSTEM, FREE SPACE OPTICAL COMMUNICATION DEVICE, AND FREE SPACE OPTICAL COMMUNICATION SYSTEM - Provided is a VCSEL that includes a first semiconductor multilayer film reflective mirror of a first conductivity type formed on a substrate and having a first impurity concentration; an active region formed thereon; a second semiconductor multilayer film reflective mirror of a second conductivity type formed on and close to the active region and having a second impurity concentration; a third semiconductor multilayer film reflective mirror of the second conductivity type formed thereon and having a third impurity concentration being higher than the second impurity concentration; and a fourth semiconductor multilayer film reflective mirror of the second conductivity type formed thereon and having a fourth impurity concentration being higher than the second impurity concentration. The reflective mirrors include a pair of a low-Al semiconductor layer and a high-Al semiconductor layer. The Al-composition of the low-Al semiconductor layer in the second reflective mirror is higher than that of the fourth mirror. | 2009-08-13 |
20090201966 | Process for a mission of pulsed laser radiation and associated laser source - The present invention especially concerns the field of lasers. Specifically, the object of the invention is a process for the emission of pulsed laser radiation generated by at least one laser crystal which is located in a cavity containing a first and a second mirror and pumped by des pumping means, wherein said process includes a first stage which consists of generating a first pumping laser radiation with an intensity of J | 2009-08-13 |
20090201967 | LASER DEVICE COMPRISING A DIFFRACTION GRATING AND COUPLED LASER RESONATORS - The present invention provides a laser device wherein one diffraction grating and at least two reflectors are arranged such that two coupled resonators are formed for the light path. This laser device is an arrangement forming a first optical resonator comprising a first and a second reflector including in its light path the diffraction by the grating. The second reflector is arranged perpendicularly to an order of diffraction of the grating. Coupled with the first resonator (A), there is provided a second mirror-reflective resonator between a mirror-reflective surface of the grating and the second reflector. In the case of the grating having an even number of ports, the second resonator needs completion by a third reflector arranged to reflect light from specular reflection by the grating back to the grating. For gratings having an odd number of ports, the second reflector is arranged in parallel to the grating. The laser medium is preferably arranged between the first reflector and the grating. | 2009-08-13 |
20090201968 | Apparatus for measuring temperature - An apparatus for ascertaining and/or monitoring at least one temperature. The apparatus includes, according to a first variable, at least one temperature sensor, at least one reference temperature sensor, and at least one heating/cooling unit, which is thermally coupled with the temperature sensor and with the reference temperature sensor. According to a second variant, the invention includes that at least one reference temperature sensor, and the temperature sensor and the reference temperature sensor are embodied and placed in such a manner that they measure essentially the same temperature. At least one head transmitter is provided, which connects the temperature sensor and the reference temperature sensor with the head transmitter in such a manner that the head transmitter receives the data measured by the temperature sensor and the reference temperature sensor. At least one memory unit is provided, in which the measured data of the temperature sensor and the reference temperature sensor are storable. | 2009-08-13 |
20090201969 | CIRCUIT ARRANGEMENT TO ADJUST AND CALIBRATE A MEMS-SENSOR DEVICE FOR FLOW MEASUREMENT OF GASES OR LIQUIDS - Circuitry is disclosed for the calibration of heating element and ambient temperature sensors, comprising: a) an amplifier having positive and negative inputs, and an output; b) one or more heating MOS transistors selectably coupled in parallel and having 1) a heating transistor drain coupled to the positive input of the amplifier; 2) a heating transistor source configured to receive a supply voltage; and 3) a heating transistor gate coupled to the amplifier output; c) one or more ambient MOS transistors selectably coupled in parallel and having 1) an ambient transistor drain, 2) an ambient transistor gate coupled to the amplifier output; and 3) an ambient transistor source configured to receive the supply voltage; d) a temperature difference resistance configured: 1) to be coupled at least partially between an ambient connection and the ambient transistor drain; and 2) to be coupled at least partially between the ambient connection and the negative input of the amplifier. | 2009-08-13 |
20090201970 | METHOD AND SYSTEM FOR MONITORING GAS MIXTURE QUALITY - A method and system for monitoring the quality of a given gas mixture being transmitted under pressure by throttling a sample of the gas mixture to a representative pressure and measuring the hydrocarbon dew point of the sample at the representative pressure. The measured hydrocarbon dew point is indicative of the cricondentherm of the gas mixture. The representative pressure is pre-selected to provide a pre-selected margin of error between measured hydrocarbon dew points of a set of representative gas mixtures at the representative pressure and respective cricondentherms of the set of representative gas mixtures. | 2009-08-13 |
20090201971 | Method and apparatus for determining component parameters by means of thermography - A method for determining parameters of a component using thermography, where at least one component is heated by a hot gas, is provided. Also provided is a device for determining component parameters using thermography, including a device for heating at least one component and a temperature sensor for detecting at least one temperature value of the component, wherein the device for heating the component is a hot gas emission device for the emission of a modulated, mostly pulsed, hot gas. | 2009-08-13 |
20090201972 | Sensor System for Determining a Physical Measured Variable - A sensor system for determining a physical, measured variable, and includes a sensor and a control/evaluation unit, which are spatially separated from one another and electrically conductively connected via a cable having at least two conductors, wherein provided in the sensor are a temperature measuring element for determining temperature and a sensor identifier for sensor identification. The control/evaluation unit drives the temperature measuring element and the sensor identifier via a shared conductor with a positive voltage or a negative voltage, and, depending on the applied voltage, reads a temperature measured value of the temperature element or an identifying value of the sensor identifier. | 2009-08-13 |
20090201973 | APPARATUS FOR TRANSMITTING DATA AND ADDITIONAL INFORMATION SIMULTANEOUSLY WITHIN A WIRE-BASED COMMUNICATION SYSTEM - An apparatus is provided for transmitting data signals and additional information signals having partially overlapping frequency bands simultaneously within a wire based communication system over the same wired medium using a spread spectrum technique for modulating the additional information signals. | 2009-08-13 |
20090201974 | METHODS AND APPARATUS FOR SPREAD SPECTRUM MODULATION AND DEMODULATION - The present invention relates to a method and an apparatus for spread spectrum modulation and demodulation using a special spread spectrum sequence, characterized in that Golay complementary codes are modulated onto orthogonal channels such that a corresponding complex complementary code is obtained. The signal spread by such complex complementary code has a low peak-to-average power ratio, a sound self-correlation property and cross-correlation property, which can well solve the problem of multi-access interference such that the communication performance of the entire system is improved. | 2009-08-13 |
20090201975 | DEGASSING CENTRIFUGAL APPARATUS WITH SENSOR - The present invention relates to a degassing centrifugal apparatus ( | 2009-08-13 |
20090201976 | SYSTEM AND METHOD FOR IMPROVING DSL PERFORMANCE - A system and method is described for determining a condition of a communication line, such as the absence of a filter device on a digital subscriber line (DSL). A first signal characterized by a high upstream power is activated over the line, and a first set of parameters associated with the communication line is obtained. A second signal characterized by a low upstream power is activated, and a second set of parameters associated with the communication line is obtained. Comparison of first and second sets of parameters is indicative of a condition of the connection and presences or absence of a DSL filter on the communication line. | 2009-08-13 |
20090201977 | BEST FRAME DERIVATION IN A WIRLESS COMMUNICATIONS NETWORK - A communications node can receive a plurality of communication signals, each including a block of data estimates with respective quality metrics. Each block of data estimates can be derived from an original block of data sent over different wireless paths, or from a derived block of data estimates sent over a different wireless path. A data combining circuit can be used to combines the blocks of data estimates as a function of the respective quality metrics to produce an output set of data estimates with a derived quality metric. | 2009-08-13 |
20090201978 | System and Method for Processing Secure Transmissions - A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency). | 2009-08-13 |
20090201979 | Method and Device for Checking a Subscriber Line - In a method for checking a subscriber line with a first and a second electrical line, wherein each line is connected to an encoder/decoder via a subscriber line circuit, the first line is connected to ground, a resistance of the second line is increased, an audio signal is outputted from the encoder/decoder to the first line; and a first frequency-selective signal is measured at a point at which the encoder/decoder is connected to the first line. Further, the second line is connected to ground, a resistance of the first line is increased, a further audio signal is output from the encoder/decoder to the second line, and a second frequency-selective signal is measured at a point at which the encoder/decoder is connected to the second line. An amplitude difference between the first and second frequency-selective signals is ascertained. | 2009-08-13 |
20090201980 | METHOD AND DEVICE FOR ESTIMATING A GAUSSIAN WHITE NOISE POWER IN A CHANNEL, AND RECEIVER - A method and device for estimating a Gaussian white noise power in a channel and a receiver are provided. The method includes performing a multi-path search on a received signal to find out paths of the signal; performing a noise estimation on one of the paths to acquire a total noise power of the path; performing an inter-path interference noise estimation on N paths spaced apart from the path by an integral number of chips to obtain an inter-path interference noise power of a single path of the signal, where N is an integer greater than or equal to 1; and subtracting the inter-path interference noise power from the total noise power to obtain the Gaussian white noise power. Through the technical solution of the disclosure, the Gaussian white noise power in a channel is obtained with a higher accuracy, so that the performance of equalization is enhanced. | 2009-08-13 |
20090201981 | Transmission Element Having a Segmented Characteristics Map - A transmission element having at least one input and at least one output is described, the transmission element delivering a functional relationship (t=F(R)) between the input quantity (R) applied to the input and the output quantity (t) that may be picked up at the output and the functional relationship (t=F(R)) being stored in a characteristics map, wherein the characteristics map comprises at least one segment having a lower limit (N(b | 2009-08-13 |
20090201982 | Precision timing pulse width communications methodology - Systems and methods are described for pulse communications using precision timing. A method includes digitally pulse coding a data stream; and modulating a carrier signal using the digitally pulse coded data stream. | 2009-08-13 |
20090201983 | METHOD AND APPARATUS FOR ESTIMATING HIGH-BAND ENERGY IN A BANDWIDTH EXTENSION SYSTEM | 2009-08-13 |
20090201984 | BANDWIDTH ASYMMETRIC COMMUNICATION SYSTEM - The present invention relates to a bandwidth asymmetric communication system comprising at least one terminal having an uplink transmission unit ( | 2009-08-13 |
20090201985 | SPLICING MPEG STREAMS - The present invention relates to a method of assembling a first data stream (ds | 2009-08-13 |
20090201986 | Method and Arrangement for Coding Transform Coefficients in Picture and/or Video Coders and Decoders and a Corresponding Computer Program and a Corresponding Computer-Readable Storage Medium - The present invention describes a method and an arrangement for coding transform coefficients in picture and/or video coders and decoders and a corresponding computer program and a corresponding computer-readable storage medium, which can particularly be employed as a novel efficient method for binary-arithmetic coding transform coefficients in the field of video coding. | 2009-08-13 |
20090201987 | METHOD AND APPARATUS FOR PLAYING A MOBILE VIDEO PROGRAM - The present application provides a method and apparatus for playing a mobile video program. The mobile video playing method and apparatus provided by the invention buffer the program content received in real time when there is a considerable movement state change. After the movement state becomes stable, playing will be resumed. While playing is resumed, the buffered contents can be firstly played (including the playing manners such as skipping, fast forward, etc), and then a program content received in real time will be played after all the buffered contents have been processed. According to the mobile video playing method provided by the invention, both the user's requirement for the continuity of a program content and the user's viewing effect will not be influenced by a fierce change of movement state of the mobile video apparatus. | 2009-08-13 |
20090201988 | SYSTEMS AND METHODS FOR VIDEO PROCESSING IN NETWORK EDGE DEVICES - The present invention provides systems and methods for video processing, such as transcoding, storage, quality testing, and the like, in network edge devices. The present invention embeds various video processing capabilities within a network to provide advantages, such as superior per-user video handling, reduced network bandwidth, increased service offerings, and the like. | 2009-08-13 |
20090201989 | Systems and Methods to Optimize Entropy Decoding - The present invention provides for an improved video compression and encoding that optimizes and enhances the overall speed and efficiency of processing video data. In one embodiment, the video codec transmits the output of an entropy decoder to a lossless compressor and memory before going through inverse discrete cosine transformation and motion compensation blocks. | 2009-08-13 |
20090201990 | METHOD AND DEVICE FOR REORDERING AND MULTIPLEXING MULTIMEDIA PACKETS FROM MULTIMEDIA STREAMS PERTAINING TO INTERRELATED SESSIONS - A method for reordering and multiplexing multimedia packets from multimedia data streams (S | 2009-08-13 |
20090201991 | METHOD FOR INTRA PREDICTION CODING OF IMAGE DATA - A method of performing an intra prediction coding with respect to a plurality of blocks included in an image frame is provided. The method of performing an intra prediction coding includes confirming whether a neighboring pixel that is referred to in an intra prediction of a block exists in the current frame, if the neighboring pixel referred to in the intra prediction exists, reading the color difference signal value of the pixel referred to in the intra prediction from the current image frame, if at least one neighboring pixel referred to in the intra prediction does not exist, reading the color difference signal value of at least one pixel from the previous image frame and performing the intra prediction with reference to the read color difference signal value of the pixel. | 2009-08-13 |
20090201992 | METHOD AND APPARATUS FOR ENCODING AND DECODING HOPPING DEFAULT VIEW FOR MULTIPLE CAMERAS SYSTEM - Provided is a multiple camera system, and more particularly, a method and apparatus for processing hopping default views in an apparatus for encoding/decoding video streams of multiple view positions. The encoding apparatus for the multiple camera system includes an encoder for receiving video signals of multiple view positions, and encoding the video signals based on a predetermined default Group of Pictures (GoP); a default GoP selector for providing the default GoP information to the encoder; and a multiplexer for multiplexing the encoded video signals and sequentially outputting only the default GoP. | 2009-08-13 |
20090201993 | SYSTEM, METHOD, AND APPARATUS FOR SCALABLE MEMORY ACCESS - Presented herein are system(s), method(s), and apparatus for scalable memory access. In one embodiment, there is presented a system for requesting services. The system comprises one or more requesting node(s) for performing a function with real-time requirements, such as making requests, wherein the one or more requesting node(s) indicates whether each of said requests is required or optional. | 2009-08-13 |
20090201994 | Method and Arrangement for Coding Transform Coefficients in Picture and/or Video Coders and Decoders and a Corresponding Computer Program and a Corresponding Computer-Readable Storage Medium - The present invention describes a method and an arrangement for coding transform coefficients in picture and/or video coders and decoders and a corresponding computer program and a corresponding computer-readable storage medium, which can particularly be employed as a novel efficient method for binary-arithmetic coding transform coefficients in the field of video coding. | 2009-08-13 |
20090201995 | METHOD AND ARRANGEMENT FOR CODING TRANSFORM COEFFICIENTS IN PICTURE AND/OR VIDEO CODERS AND DECODERS AND A CORRESPONDING COMPUTER PROGRAM AND A CORRESPONDING COMPUTER-READABLE STORAGE MEDIUM - The present invention describes a method and an arrangement for coding transform coefficients in picture and/or video coders and decoders and a corresponding computer program and a corresponding computer-readable storage medium, which can particularly be employed as a novel efficient method for binary-arithmetic coding transform coefficients in the field of video coding. | 2009-08-13 |
20090201996 | Method and Arrangement for Coding Transform Coefficients in Picture and/or Video Coders and Decoders and a Corresponding Computer Program and a Corresponding Computer-Readable Storage Medium - The present invention describes a method and an arrangement for coding transform coefficients in picture and/or video coders and decoders and a corresponding computer program and a corresponding computer-readable storage medium, which can particularly be employed as a novel efficient method for binary-arithmetic coding transform coefficients in the field of video coding. | 2009-08-13 |
20090201997 | DIGITAL TELEVISION TRANSMISSION AND RECEIVING APPARATUS AND METHOD USING 1/4 RATE CODED ROBUST DATA - Provided is a Vestigial Side Band Digital Television (DTV) transmitter/receiver based on Advanced Television System Committee A/53. The invention provides DTV transmitter/receiver having a dual stream structure through generation of robust data which has a transmission rate a fourth as fast as that of normal data, and a method thereof. The DTV transmitter includes: input means for receiving digital video data stream including normal and robust data; encoding means for performing ¼ rate coding on the digital video data stream so that one bit can be transmitted through two symbols; and transmitting means for modulating/transmitting output signals of the encoding means. This invention can reduce SNR and satisfy TOV of robust data by performing additional FEC on robust data, transmitting/receiving ¼ rate coded robust data, which are capable of transmitting one-bit data for two symbols, and improving decoding ability of an equalizer and a trellis decoder of a DTV receiver. | 2009-08-13 |
20090201998 | TIME-STAMP ADDITION APPARATUS, TIME-STAMP ADDITION METHOD AND TIME-STAMP ADDITION PROGRAM - A time-stamp addition apparatus configured to add a time stamp to each individual one of a plurality of TS (Transport Stream) packets included in an MPEG2-TS (Moving Picture Experts Group 2 Transport Stream) to serve as a time stamp representing an input timing to supply the individual TS packet to a decoder configured to decode the MPEG2-TS, the time-stamp addition apparatus includes: a discontinuity detection section; a PCR detection section; a time-interval computation section; and a time-stamp computation section. | 2009-08-13 |
20090201999 | Complementing Bitstream Error and Decoding - Among other things, techniques, systems and apparatus are described for complementing a bitstream error so that a hardware decoder can stably decrypt a bitstream. A method of complementing a bitstream error includes: receiving a bitstream; detecting an error in the received bitstream; and complementing the detected error, before decrypting the bitstream. | 2009-08-13 |
20090202000 | APPARATUS FOR ENCODING AND DECODING HEADER DATA IN PICTURE SIGNAL TRANSMISSION - Control data subsequent to an extension start code is stored in an encoding apparatus when transmitted after each header data of a video sequence layer, a GOP layer, a picture layer and a slice layer. And in transmission of the next header data, the content of the control data subsequent to the extension start code in the header data to be transmitted is compared with the content of the preceding header data of the same layer stored in the encoding apparatus. And if the result of such comparison signifies that the compared data are mutually the same, neither the extension start code nor the subsequent control data is transmitted. At the reception of each header data of the video sequence layer, the GOP layer, the picture layer and the slice layer, the control data decoded subsequently to the extension start code is stored in the decoding apparatus. And when the extension start code is not existent in the next header data to be decoded, the preceding header data of the same layer stored in the decoding apparatus is duplicated and used as the control data of the layer being currently encoded. | 2009-08-13 |
20090202001 | IMAGE PROCESSING METHOD AND APPARATUS, IMAGE PROCESSING PROGRAM, AND STORAGE MEDIUM WHICH STORES THE PROGRAM - An image processing method includes determining a first bandwidth based on original image data; computing a filter coefficient array for implementing frequency characteristics corresponding to a band limitation using the first bandwidth; generating first filtered image data by subjecting the original image data to a filtering process using the first filter coefficient array; deriving an objective image-quality estimation value of the first filtered image data, and computing an allocation coefficient used for determining an optimum bandwidth, based on the objective image-quality estimation value; determining the optimum bandwidth corresponding to the computed allocation coefficient by referring to a table in which a correspondence relationship between the allocation coefficient and the optimum bandwidth is defined; computing an optimum filter coefficient array for implementing the frequency characteristics corresponding to a band limitation using the optimum bandwidth; and generating optimum filtered image data by subjecting the original image data to a filtering process using the optimum filter coefficient array. | 2009-08-13 |
20090202002 | REDUCING ERRORS IN DATA BY SYNCHRONIZING OPERATIONS WITH NOISELESS PERIODS OF DATA TRANSMISSION - Methods, systems, computer readable media and means for reducing errors in data caused by noise are provided. In some embodiments of the present invention, timing data is transferred from first circuitry to second circuitry. From the timing data, one or both of the first circuitry and the second circuitry detect whether noise is present as a result of the operations of the first circuitry. If it is detected that noise is present the second circuitry waits for the cessation of the noise before functioning again. If it is detected that no noise is present, the second circuitry functions. | 2009-08-13 |
20090202003 | COMPENSATION OF ETHERNET TRANSMIT BASELINE WANDER - Compensation of transmit baseline wander in data transmission on a network. In one aspect, compensating for baseline wander includes receiving a signal to be transmitted by a transmitter, where the transmitter is operable with a higher-speed transmission standard requiring magnetics a first open circuit inductance. The signal is processed to compensate for a transmit baseline wander in the signal, the transmit baseline wander associated with a lower-speed transmission standard that requires magnetics with a second open circuit inductance that is higher than the first open circuit inductance. The processed signal is to be provided for transmission on a twisted pair cable of the network. | 2009-08-13 |
20090202004 | Analog Multi-Tone Receiver - An analog multi-tone receiver includes an interface for receiving a data transmission signal containing N sub-channel signals corresponding to N active sub-channels. The receiver includes a plurality of samplers to sample, during each time interval of a sequence of time intervals, the received signal in parallel to produce a plurality of data sets, each sampler having a distinct threshold level. The receiver includes a decoder to jointly decode the plurality of data sets to determine a plurality of data symbols including at least one data symbol for each of the N active sub-channels. | 2009-08-13 |
20090202005 | Method and Apparatus for Improved Channel Estimation for Communications Signal Processing - Teachings presented herein present a “whitening” channel estimation method and apparatus that produce high-quality net channel estimates for processing a received signal, such as a received CDMA signal. Processing includes forming an initial least squares problem (for medium channel estimates) using known pilot values and corresponding pilot observations for the received signal, transforming the initial least squares problem using a whitening transformation term, and solving the transformed least squares problem to obtain whitened medium channel estimates. The whitening transformation term may be determined, for example, by carrying out a Cholesky factorization of a (traffic) data correlation matrix, which can be obtained from traffic data values for the received signal. Processing further includes converting the whitened medium channel estimates into whitened net channel estimates, which consider the effects of transmit/receive filtering. | 2009-08-13 |
20090202006 | MULTI-CARRIER TRANSMITTER - A multi-carrier transmitter and methods thereof are provided. For example, a multi-carrier transmitter comprises a processor operable to receive a plurality of baseband signals. Each of the plurality of baseband signals correspond to a separate data communication. A modulator is in communication with the processor. A non-linear device is in communication with the modulator. The processor is further operable to combine the plurality of baseband signals to generate a composite baseband signal. The modulator is operable to modulate a carrier signal with the composite baseband signal to generate a multi-carrier signal. The multi-carrier signal is provided to an input of the non-linear device. | 2009-08-13 |
20090202007 | Frequency dependent phase rotation prior to mapping in an OFDM transmitter - An input bit stream is phase rotated by reversing bit pairs and inverting bits. The manipulated bit stream is mapped to a symbol and the mapped symbol is converted to the time domain such that an output of the time domain conversion is an ordered set of N samples that allow efficient cyclic prefix insertion without rotation at the symbol level. A first portion of the set of samples is stored in a buffer, and the complete set of samples is output followed by the buffered first portion of the set of samples for transmission. The set of samples can be N | 2009-08-13 |
20090202008 | WIRELESS COMMUNICATION APPARATUS - A wireless communication device including a sending data amount determination unit, a data sending unit, a monitor function unit, a transmission control data producing unit, a transmission control data sending unit, a data reception unit, and an application I/F (interface) unit. The transmission control data sending unit includes a transmission control data separation unit, a transmission control data replication unit, and a data mapping unit. | 2009-08-13 |
20090202009 | WIRELESS COMMUNICATIONS APPARATUS - Allocation of subcarriers of a wireless communications channel to antennas for transmission of said subcarriers from a multi-antenna transmitter, comprises selecting, for each subcarrier, the antenna with the most effective transmission performance against a predetermined performance criterion; and determining if subcarriers are evenly distributed amongst said antennas. If even distribution does not arise, then a reallocation sequence is performed. This comprises identifying, for an antenna having excessive subcarriers allocated thereto, the subcarriers allocated thereto and reallocating one of said subcarriers as required, said reallocated subcarrier being selected for reallocation on the basis of its impact on transmission performance. | 2009-08-13 |
20090202010 | SUB-CARRIER ALIGNMENT MECHANISM FOR OFDM MULTI-CARRIER SYSTEMS - A method of aligning sub-carriers of radio signals of two adjacent frequency channels and devices therefor are described. The method comprises aligning a first plurality of sub-carriers of a first radio signal and a second plurality of sub-carriers of a second radio signal within an overlapped frequency region in-between the two adjacent frequency channels by shifting a center frequency of the first radio signal with a frequency offset. The first radio signal and the second radio signal are adapted for transmission over the two adjacent frequency channels and the first frequency channel is one of the two adjacent frequency channels. | 2009-08-13 |
20090202011 | Techniques to time vary pilot locations in wireless networks - An embodiment of the present invention provides an apparatus, comprising a receiver capable of selecting optimal pilot locations and providing feedback of the pilot locations to a transmitter in communication with the receiver. The optimal pilot locations may be selected by locations that avoid strong interference or platform noise at the receiver, by locations that avoid deep fading, by locations that maximize the spacing between pilot tones at the two ends of a wireless frequency band or by locations that equalize the interspacing between any two adjacent pilots. | 2009-08-13 |
20090202012 | SYSTEM AND METHOD FOR DATA SCRAMBLING TO REDUCE THE CREST FACTOR IN AN OFDM WAVEFORM - A method is provided for minimizing the peak power level in a combination of orthogonal frequency division multiplexed (OFDM) tones. The method is particularly effective when the information to be communicated is digital data consisting of long patterns of “1”s or “0”s. The digital data of the message is combined with a scrambling vector before the data is modulated. The randomization of data patterns, in turn, leads to a more random combination of OFDM tone amplitude being transmitted. The message is recovered at the receiver by removing the scrambling vector. A table of scrambling vectors is maintained at the transmitters and receivers. The table pointer to select the scrambling vector is selected in response to the position of the message in the communication structure. An OFDM communication system using the above-described method is also provided. | 2009-08-13 |
20090202013 | WIRELESS COMMUNICATION NETWORK AND METHOD FOR EXTENDED-RANGE UPLINK COMMUNICATIONS - Embodiments of a wireless network and method for extended-range communications are generally described herein. In some embodiments, an RF bandwidth of an uplink communication channel is established for a plurality of subscriber units. A desired channel quality is also established for uplink communications from each subscriber unit to a base transceiver station over the uplink communication channel. The RF bandwidth of the uplink communication channel is reduced and additional time-slots are allocated to the uplink communication channel of some subscriber units to achieve the desired channel quality for the uplink communications to provide extended-range uplink communications for subscriber units that are further from the base transceiver station. | 2009-08-13 |
20090202014 | Adaptation Techniques in MIMO - A method of the multiple input multiple output feedback is disclosed. In accordance with an embodiment of the invention, the multiple input multiple output feedback method includes a receiver receiving a reference signal from a base station and calculating a signal to interference and noise ratio from the received reference signal. The method further includes determining a modulation and coding scheme based on the signal to interference and noise ratio and a receiver type. | 2009-08-13 |
20090202015 | TRANSMITTER HAVING FULL-DIVERSITY AND FULL-RATE, A LINEAR SPACE-TIME CODE GENERATING METHOD FOR THE TRANSMITTER, AND A MIMO SYSTEM USING SAME - A space-time code has a codeword matrix. The codeword matrix is a square matrix with dimension equal to the number of the transmit antennas, wherein a row of the codeword matrix represents combined signals transmitted by each transmit antenna and a column of the codeword matrix represents timeslots of the number of the transmit antennas. Signals are transmitted through the rows of the number of spatial multiplexing rate, in each column of the matrix. Further, the symbols of the number of the transmit antennas are combined by way of utilizing complex weights, in each row of the matrix. With this space-time code, a delay is minimized, so that change of channels can be managed efficiently. Also, the space-time code has minimum number of data symbols, and thus its complexity is minimized. | 2009-08-13 |
20090202016 | OPEN-LOOP TRANSMIT DIVERSITY SCHEMES WITH FOUR TRANSMIT ANTENNAS - In a wireless communication system, SFBC-based (Space-Frequency Block-Code) transmission diversity schemes provide enhancement for multiple antennas, such as the illustrative four, in order to achieve better performance than SFBC-FSTD (SFBC-Frequency Switching Transmit Diversity) alone. SFBC-PFSTD (Precoded Frequency Switching Transmit), which is multiplying a precoding matrix to the SFBC-FSTD signals, opens up the possibility of utilizing the pilot tones in synchronization channels (SSC and/or PSC) to enhance the channel estimation performance for antenna | 2009-08-13 |
20090202017 | Distortion Control Device and Method - This invention includes a waveform analyzing means ( | 2009-08-13 |
20090202018 | SYNCHRONIZATION TECHNIQUES FOR POLAR TRANSMITTERS - Various techniques involving polar modulation are disclosed. For instance, an apparatus may include a storage medium and a calibration module. The storage medium stores multiple adjustment settings. Each of these adjustment settings corresponds to an operating condition. The calibration module selects one of the stored adjustment settings that corresponds to a current operating condition. With the selected adjustment setting, the calibration module reduces a polar modulation timing misalignment. The current operating condition may include one or more operational parameter values. Examples of such parameter values include output power level, signal frequency, and/or temperature. | 2009-08-13 |
20090202019 | RF POLAR TRANSMITTER AND INTEGRATED CIRCUIT WITH PROGRAMMABLE FILTER MODULE AND METHODS FOR USE THEREWITH - A radio frequency (RF) transmitter includes a transmitter processing module that generates a processed signal and a modulating signal based on outbound data. An up-conversion module up-converts the processed signal to generate an up-converted signal. A programmable filter module generates a first plurality of delayed signals from the up-converted signal and that generates a filtered up-converted signal by combining the up-converted signal and the first plurality of delayed signals, wherein a delayed signal of the first plurality of delayed signals is scaled based on one of a first plurality of coefficients, wherein the first plurality of coefficients are selected based on a control signal. A polar amplifier amplifies and amplitude modulates the filtered up-converted signal based on the modulating signal to generate a transmit signal. A processing module generates the control signal to attenuate at least one RF spur of the up-converted signal. | 2009-08-13 |