Patent application number | Description | Published |
20100167639 | SYSTEM AND METHOD FOR FEEDBACK CANCELLATION IN REPEATERS - An apparatus for repeating signals includes a receive antenna for receiving input signals, processing circuitry for processing the input signals to form repeated signals, and a transmit antenna for transmitting the repeated signals. The processing circuitry includes an adaptive digital filter configured to generate cancellation signals that are added to the input signals to cancel unwanted feedback signals from the input signals. A frequency shifting circuit adds a frequency shift to the input signals, after the addition of the cancellation signals, to form repeated signals that are frequency shifted from the input signals. A digital signal processor is coupled to the adaptive digital filter for digitally adapting the filter. The digital signal processor utilizes the frequency shift of the transmission signals to adapt the adaptive digital filter. | 07-01-2010 |
20110241425 | METHOD AND APPARATUS FOR DISTRIBUTING POWER OVER COMMUNICATION CABLING - A PoE powered device and method of operation are provided. The device includes a first port unit configured to negotiate receipt of a level of PoE power from a power sourcing equipment. The power is received on a first pair of taps on a first communication port. A detection unit is configured to detect a presence of a first optional circuit load and to detect a presence of a second optional power load. A control circuit is configured to establish connectivity between a second pair of taps on the first communication port and a second powered device port unit in response to the detection unit detecting the first optional load, and further configured to establish connectivity between the second pair of taps and a third pair of taps on a pass-through communication port in response to the detection unit failing to detect the first load and detecting the second load. | 10-06-2011 |
20110243291 | SYNCHRONOUS TRANSFER OF STREAMING DATA IN A DISTRIBUTED ANTENNA SYSTEM - Embodiments of the invention provide a method, distributed antenna system, and components that generate a jitter reduced clock signal from a serial encoded binary data stream transmitted over a communication medium. The method comprises receiving a modulated signal that includes the encoded binary data stream and extracting the encoded binary data stream. The method further comprises generating a recovered clock signal that is phase locked to the encoded binary data stream, generating an error signal based on a difference between a phase of the encoded binary data stream and the recovered clock signal, and integrating the error signal to generate a signal to control a voltage controlled oscillator. The method further comprises generating a stable recovered clock signal and producing at least one output clock by scaling the stable recovered clock signal frequency. | 10-06-2011 |
20120170620 | SYSTEM AND METHOD FOR FEEDBACK CANCELLATIO IN REPEATERS - An apparatus for repeating signals includes a receive antenna for receiving input signals, processing circuitry for processing the input signals to form repeated signals, and a transmit antenna for transmitting the repeated signals. The processing circuitry includes an adaptive digital filter configured to generate cancellation signals that are added to the input signals to cancel unwanted feedback signals from the input signals. A frequency shifting circuit adds a frequency shift to the input signals, after the addition of the cancellation signals, to form repeated signals that are frequency shifted from the input signals. A digital signal processor is coupled to the adaptive digital filter for digitally adapting the filter. The digital signal processor utilizes the frequency shift of the transmission signals to adapt the adaptive digital filter. | 07-05-2012 |
20130095870 | UPLINK NOISE MINIMIZATION - A method and apparatus for controlling uplink signal power in a distributed antenna system | 04-18-2013 |
20130114651 | SYSTEM AND METHOD FOR FEEDBACK CANCELLATION IN REPEATERS - An apparatus for repeating signals includes a receive antenna for receiving input signals, processing circuitry for processing the input signals to form repeated signals, and a transmit antenna for transmitting the repeated signals. The processing circuitry includes an adaptive digital filter configured to generate cancellation signals that are added to the input signals to cancel unwanted feedback signals from the input signals. A frequency shifting circuit adds a frequency shift to the input signals, after the addition of the cancellation signals, to form repeated signals that are frequency shifted from the input signals. A digital signal processor is coupled to the adaptive digital filter for digitally adapting the filter. The digital signal processor utilizes the frequency shift of the transmission signals to adapt the adaptive digital filter. | 05-09-2013 |
20130129009 | TRANSPORT DATA REDUCTION FOR DAS SYSTEMS - A distributed antenna system having improved data transmission features incorporates endpoints of the system, which are coupled together by serial data link. At the endpoints, processing may occur utilizing processing circuitry to determine similarities between multiple signal streams. If the streams are similar, the data sent over the serial digital link is reduced by only sending one of the representative signals. In an alternative embodiment of the invention, the difference between the signals might be sent as well. Alternatively, all signals might be sent, but may be compressed with compression circuitry before the signals are transmitted over the serial link. At the endpoint of the system, the signals are reconstructed for further processing and transmission. | 05-23-2013 |
Patent application number | Description | Published |
20120309328 | BROADBAND DISTRIBUTED ANTENNA SYSTEM WITH NON-DUPLEXER ISOLATOR SUB-SYSTEM - Certain aspects and aspects of the present invention are directed to a distributed antenna system having a downlink communication path, an uplink communication path, and a non-duplexer isolator sub-system. The downlink communication path can communicatively couple a transmit antenna to a base station. The uplink communication path can communicatively couple a receive antenna to the base station. In one aspect, the non-duplexer isolator sub-system can be electronically configured for isolating uplink signals traversing the uplink communication path from downlink signals. In another aspect, a non-duplexer isolator sub-system can be configurable in one or more mechanical steps selecting a frequency response. In another aspect, a non-duplexer isolator sub-system can include an active mitigation sub-system. | 12-06-2012 |
20120314797 | Distributed Antenna System Interface for Processing Digital Signals in a Standardized Format - An interface is provided for processing digital signals in a standardized format in a distributed antenna system. One example includes a unit disposed in a distributed antenna system. The unit includes an interface section and an output section. The interface section is configured for outputting a first complex digital signal and a second complex digital signal. The first complex digital signal is generated from a digital signal in a standardized format received from a digital base station. The output section is configured for combining the first complex digital signal and the second complex digital signal into a combined digital signal. The output section is also configured for outputting the combined digital signal. The combined digital signal comprises information to be wirelessly transmitted to a wireless user device. | 12-13-2012 |
20120317426 | DISTRIBUTED ANTENNA SYSTEM USING POWER-OVER-ETHERNET - A system is provided for adjusting power provided to a device. The system can include power sourcing equipment and a sub-system. The power sourcing equipment can provide power to a powered device via a channel. The sub-system can determine an amount by which to increase the power based on a resistance of the channel. The power sourcing equipment or the powered device can adjust the power (or load) responsive to a command from the sub-system. The sub-system can include a measurement device and a processor. The measurement device can measure an output voltage of the power sourcing equipment, an input voltage of the powered device, and a current on the channel. The processor can determine the resistance of the channel based on the output voltage, the input voltage, and the current. The processor can output a command specifying an increase or decrease in power supplied by the power sourcing equipment. | 12-13-2012 |
20130136202 | SYSTEMS AND METHODS FOR TRANSPORTING DIGITAL RF SIGNALS - A telecommunications system is provided that can re-sample a digitized signal at a resample rate that is based on one or more factors to better utilize bandwidth. The factors can include the bandwidth of the signal that the digitized signal represents, the amount of bandwidth owned or used by the carrier, the full bandwidth of the designated RF band, the bandwidth of the serial link, the frame length of the serial link, the segmentation of the frames on the serial link, and the capability of the equipment at the receiving end of a serial link. The re-sampled signal can be transmitted to another unit that is remote to the unit transmitting the signal. The other unit can include a re-sampling device that restores the re-sampled signal to a digital signal that can be converted to an analog signal for wireless transmission. | 05-30-2013 |
20130201916 | OPTIMIZED TELECOMMUNICATIONS DISTRIBUTION SYSTEM - Systems and methods for optimized telecommunications distribution are provided. For example, a distributed antenna system can include a master unit for transceiving signals with remote units operable for wirelessly transceiving signals with mobile devices in a coverage area. A self-optimized network analyzer can be in a unit of the distributed antenna system. A self-optimized network controller in the distributed antenna system can output commands for changing operation of a component in the distributed antenna system in response to analysis results from the self-optimized network analyzer. In some aspects, the master unit includes base transceiver station cards for receiving call information in network protocol data from a network and for generating digital signals including the call information from the network protocol data for distribution to the remote units. | 08-08-2013 |
20140119281 | Digital Baseband Transport in Telecommunications Distribution Systems - A telecommunications system is provided that includes a unit for communicating channelized digital baseband signals with remotely located units. The channelized digital baseband signals include call information for wireless communication. The unit includes a channelizer section and a transport section. The channelizer section can extract, per channel, the channelized digital baseband signals using channel filters and digital down-converters. The transport section can format the channelized digital baseband signals for transport together using a transport schedule unit for packetizing and packet scheduling the channelized digital baseband signals. A signal processing subsystem can control a gain of uplink digital baseband signals, independently, that are received from the remotely located units prior to summing the uplink digital baseband signals. | 05-01-2014 |
20140314002 | EXTRACTING SUB-BANDS FROM SIGNALS IN A FREQUENCY DOMAIN - Embodiments are disclosed for extracting sub-bands of interest from signals in a frequency domain for transmission via a distributed antenna system. In one aspect, a transformed downlink signal is generated by performing a frequency transform on a downlink signal. The transformed downlink signal represents the downlink signal in a frequency domain. At least one sub-band of the transformed downlink signal is identified as including data to be transmitted via the distributed antenna system. The sub-band is extracted from the transformed downlink signal for transmission via the distributed antenna system. | 10-23-2014 |
20140335799 | BROADBAND DISTRIBUTED ANTENNA SYSTEM WITH NON-DUPLEXER ISOLATOR SUB-SYSTEM - Certain aspects and aspects of the present invention are directed to a distributed antenna system having a downlink communication path, an uplink communication path, and a non-duplexer isolator sub-system. The downlink communication path can communicatively couple a transmit antenna to a base station. The uplink communication path can communicatively couple a receive antenna to the base station. In one aspect, the non-duplexer isolator sub-system can be electronically configured for isolating uplink signals traversing the uplink communication path from downlink signals. In another aspect, a non-duplexer isolator sub-system can be configurable in one or more mechanical steps selecting a frequency response. In another aspect, a non-duplexer isolator sub-system can include an active mitigation sub-system. | 11-13-2014 |
20140376499 | OPTIMIZED TELECOMMUNICATIONS DISTRIBUTION SYSTEM - Systems and methods for optimized telecommunications distribution are provided. For example, a distributed antenna system can include a master unit for transceiving signals with remote units operable for wirelessly transceiving signals with mobile devices in a coverage area. A self-optimized network analyzer can be in a unit of the distributed antenna system. A self-optimized network controller in the distributed antenna system can output commands for changing operation of a component in the distributed antenna system in response to analysis results from the self-optimized network analyzer. In some aspects, the master unit includes base transceiver station cards for receiving call information in network protocol data from a network and for generating digital signals including the call information from the network protocol data for distribution to the remote units. | 12-25-2014 |
20150026489 | DISTRIBUTED ANTENNA SYSTEM USING POWER-OVER-ETHERNET - A system is provided for adjusting power provided over a channel to a device. The system can include power sourcing equipment and a sub-system. The power sourcing equipment can provide power to a powered device via a channel. The sub-system can determine an amount by which to increase the power based on a resistance of the channel. The power sourcing equipment or the powered device can adjust the power (or load) in response to a command from the sub-system. The sub-system can include at least one measurement device and a processor. The measurement device can measure an output voltage of the power sourcing equipment, an input voltage of the powered device, and a current on the channel. The processor can determine the resistance of the channel based on the output voltage, the input voltage, and the current. The processor can output a command specifying an increase or decrease in the level of power supplied by the power sourcing equipment. | 01-22-2015 |
20150063273 | DIGITAL BASEBAND TRANSPORT IN TELECOMMUNICATIONS DISTRIBUTION SYSTEMS - A telecommunications system is provided that includes a unit for communicating channelized digital baseband signals with remotely located units. The channelized digital baseband signals include call information for wireless communication. The unit includes a channelizer section and a transport section. The channelizer section can extract, per channel, the channelized digital baseband signals using channel filters and digital down-converters. The transport section can format the channelized digital baseband signals for transport together using a transport schedule unit for packetizing and packet scheduling the channelized digital baseband signals. A signal processing subsystem can control a gain of uplink digital baseband signals, independently, that are received from the remotely located units prior to summing the uplink digital baseband signals. | 03-05-2015 |
Patent application number | Description | Published |
20140003561 | Canceling Narrowband Interfering Signals in a Distributed Antenna System | 01-02-2014 |
20140177760 | SYNCHRONOUS TRANSFER OF STREAMING DATA IN A DISTRIBUTED ANTENNA SYSTEM - Embodiments of the invention provide a method, distributed antenna system, and components that generate a jitter reduced clock signal from a binary encoded data stream transmitted over a communication medium. The method includes receiving a modulated signal that includes the binary encoded data stream and generating a recovered clock signal that is phase locked to the binary encoded data stream. The method further comprises generating a stable recovered clock signal by filtering the recovered clock signal to remove jitter, while allowing the clock signal to track long-term drift. | 06-26-2014 |
20150085962 | CANCELING NARROWBAND INTERFERING SIGNALS IN A DISTRIBUTED ANTENNA SYSTEM - Canceling narrowband interfering signals in a distributed antenna system is provided. In one aspect, a cancellation sub-system includes a decimator module, a filter, an interpolator module, and a combiner module coupled to the uplink path and a reference path in parallel with the uplink path. The reference path includes the decimator module, the filter, and the interpolator module. The decimator module decimates a reference signal sampled from an uplink signal traversing an uplink path of the remote antenna unit. Each of the uplink signal and the reference signal includes a narrowband interfering signal component. The filter generates a cancellation signal from the reference signal by attenuating the reference signal outside a frequency band that includes the interfering signal component. The interpolator module interpolates the cancellation signal to a sampling rate of the uplink signal. The combiner module can subtract the cancellation signal from the uplink signal. | 03-26-2015 |
20150126251 | METHOD AND APPARATUS FOR DISTRIBUTING POWER OVER COMMUNICATION CABLING - A PoE powered device and method of operation are provided. The device includes a first port unit configured to negotiate receipt of a level of PoE power from a power sourcing equipment. The power is received on a first pair of taps on a first communication port. A detection unit is configured to detect a presence of a first optional circuit load and to detect a presence of a second optional power load. A control circuit is configured to establish connectivity between a second pair of taps on the first communication port and a second powered device port unit in response to the detection unit detecting the first optional load, and further configured to establish connectivity between the second pair of taps and a third pair of taps on a pass-through communication port in response to the detection unit failing to detect the first load and detecting the second load. | 05-07-2015 |
Patent application number | Description | Published |
20080294779 | Connection Management in Peer-to-Peer Content Distribution Clouds - A topology management process is implemented which involves removing or “tearing down” connections between nodes in certain situations in order to try to replace those connections with more optimal ones. Idle connections are torn down unless those are in a “notify” state; a notify state being one in which a request for content has been made to a neighbour but that neighbour has no available content as yet. Idle connections in a notify state are torn down only if they remain idle for a longer time than that required before an idle connection is torn down. To avoid problems caused by clusters of node forming and of loners being unable to join the cloud, network churn algorithms are taught. These involve requiring nodes to drop connections when specified conditions are met. Relative content distribution between connections is monitored and this information used to influence selection of those connections to drop. | 11-27-2008 |
20080301246 | Peer-To-Peer Message Format Data Structure - A wire protocol is described which implements connection management and other methods to give enhanced peer-to-peer content distribution. Connections between nodes can be placed in a “notify” state when they are idle but may soon yield useful content. This notify state is also used together with a content request/response cycle to allow a peer to evaluate content available at a neighbour. If no suitable content is available a notify state is entered. When new content is later received at the neighbour it is able to inform the requesting node to allow it to restart the content request/response cycle. | 12-04-2008 |
20080320300 | Authorisation and Authentication - The invention relates to content distribution over a network and provides methods of controlling the distribution, of receiving the content and of publishing content. The method of controlling distribution of content over a network includes receiving a content description and location information for a source of the content from a publisher, where the content description comprises authorisation details associated with the publisher. The validity of the authorisation details is checked and if found to be valid, the content description is provided to a node in the network | 12-25-2008 |
20090248898 | Encoding And Decoding Optimisations - The invention provides methods of encoding content for distribution over a network and methods for decoding encoded content which has been distributed over the network. In a first example in which the content is divided into a plurality of segments and each segment comprising a plurality of blocks of data, the method comprises selecting a segment from the plurality of segments and selecting at least two blocks of the selected segment from a store of blocks. A new encoded block is created from a linear combination of the selected blocks. | 10-01-2009 |
Patent application number | Description | Published |
20090306910 | High density, rectangular binary code symbol - A binary code symbol for non-linear strain measurement designed specifically for perimeter-based deformation and strain analysis. The symbol is rectangular with a continuous outer perimeter, two data regions along adjacent sides of the rectangle and a utility region adjacent each side opposite the data regions. Each data region is made up of at least two rows, each of which is made up of a number of data cells, and each utility region is made up of at least two rows, each of which is made up of utility cells with alternating appearance. There are at least two distinct finder cells on opposite corners of the rectangle, which can be used to orient the symbol. A non-linear strain gage for measuring the strain on an object under load in accordance includes a target, a sensor, and a computer, wherein the target is a binary code symbol. | 12-10-2009 |
20090312961 | Multi-format,binary code symbol for non-linear strain measurement - A binary code symbol for non-linear strain measurement that can be constructed in any geometric shape having a solid, continuous perimeter containing straight line segments. The symbol includes finder cells to “orient” the symbol in order to associate strain measurements with physical dimensions; and contains encoded data in “data regions” and/or “utility regions.” The data and utility regions can be distinct and separate, combined, exclusive (i.e. data regions and no utility regions, or utility regions and no data regions), or omitted. The data “density” can be varied depending upon the application, by varying the number of distinct data or utility cells present in the data regions or utility regions. | 12-17-2009 |
20090326836 | Two dimensional bar code having increased accuracy - A two-dimensional matrix code containing dark and light square data modules, and a finder pattern of two bars of alternating dark and light square data modules on the perimeter of the symbol for indicating both orientation and printing density of the symbol, wherein all of the data modules are the same dimension and data is encoded based on the absolute position of the dark modules within the matrix. In a first embodiment inner and outer solid bars are provided along the base and right-hand side of the matrix code symbol, the inner and outer solid bars each having a width equal to the square data modules, the inner solid bar being light and the outer solid bar being dark. In a second embodiment, an inner solid bar and an outer encoding bar are provided along the base and right-hand side of the matrix code symbol. | 12-31-2009 |
20100072288 | Augmented binary code symbol - An augmented binary code symbol (100) includes a perimeter, first and second data regions ( | 03-25-2010 |
20100139412 | DIFFERENTIAL NON-LINEAR STRAIN MEASUREMENT USING BINARY CODE SYMBOL - The bands and corners of rectangular or other geometric shapes for binary code symbols are used to measure non-linear and non-uniform strain in a material with an anomaly such as a crack in the area of strain measurement. In particular, they can be used to evaluate differential strains in the regions of the bands and corners; and the external and internal boundaries can be used to measure differentials in strain between the external boundaries and internal boundaries. | 06-10-2010 |
20110049250 | Nested binary code symbol - A nested binary code symbol (200) comprising a boundary binary code symbol ( | 03-03-2011 |
20110184664 | DIRECTLY APPLIED READ AND TRANSMIT - DIGITAL STRAIN ENCODER AND DIGITAL LOAD CELL - A digital strain encoder includes a gage-emitter, a sensor-receiver, a transmitter, and an energy source. The gage-emitter is affixable to a surface to be measured and deformable on a one-to-one basis with the surface, and emits a reference strain signal in the absence of strain and an altered strain signal when the surface is subjected to strain and the gage-emitter is deformed. The gage-emitter also emits a unique reference identification signal. The sensor-receiver floats over the gage-emitter so as not to deform with the surface, and detects the reference and altered strain signals and the identification signal emitted by the gage-emitter. The transmitter is coupled to the sensor-receiver for transmitting the detected reference and altered strain signals to a remote receiver. | 07-28-2011 |
20120185182 | TWO DIMENSIONAL BAR CODE HAVING INCREASED ACCURACY - A two-dimensional matrix code containing dark and light square data modules, and a finder pattern of two bars of alternating dark and light square data modules on the perimeter of the symbol for indicating both orientation and printing density of the symbol, wherein all of the data modules are the same dimension and data is encoded based on the absolute position of the dark modules within the matrix, and inner and outer bars are provided along adjacent sides of the matrix code symbol, each bar having a width equal to the square data modules. In one embodiment, the inner and outer bars are solid. In another embodiment, the inner solid is bar and the outer bar is an encoding bar. | 07-19-2012 |
20130094013 | Nested Binary Code Symbol - A non-linear strain gage includes a target for association with an object for which at least one of strain and fatigue damage is to be measured, a sensor, and a computer. The target incorporates a nested binary code symbol for perimeter-based deformation and strain analysis and emits a detectable physical quantity. The binary code symbol includes a boundary binary code symbol having a perimeter constructed of line segments and at least a core code symbol that provides encoded data. The core code symbol is nested within and concentric with the boundary binary code symbol. A method of measuring strain on an object directly using the non-linear strain gage is also provided. | 04-18-2013 |