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| 20090286471 | Method for Allocating Power to Source and Relay Stations in Two-Hop Amplify-and-Forward Relay Multi-Input-Multi-Output Networks - Disclosed is a method for static power allocation to source and relay stations in a two-hop amplify-and-forward (AF) relay multi-input-multi-output (MIMO) network including of a source station (SS), a relay station (RS), and a destination station (DS) each transmitting signals using multiple antennas. The method performs power allocation to the SS and the RS according to the path loss, or equivalently, according to a distances, between the SS and the RS and the RS and DS. The transmit power of each transmit antenna at the SS and the power amplifying gain of the RS are determined from the power allocation outputs. | 11-19-2009 |
| 20100195751 | Method for Estimating Channels in Two-Hop MIMO AF Networks - A method estimates interim channels in a two-hop multi-input-multi-output (MIMO) amplify-and-forward (AF) relay network including a source station (SS), a relay station (RS), and a destination station (DS). The estimate is according to the overall channel obtained at the DS or the SS. By varying an amplifying matrix of the RS over time, the method establishes a linear equation group with respect to the elements of the interim channels over the first (SS-RS) and second (RS-SS) hops, based on which low-complexity estimation of the interim channels is performed. | 08-05-2010 |
| 20110044158 | Cross-Talk Cancellation in Cooperative Wireless Relay Networks - Cross-talk is canceled in a cooperative wireless relay network that includes a base station (BS), a relay station (RS), and a mobile station (MS). A coupling channel between a transmit antenna and a receive antenna colocated at the RS is estimated. Cross-talk interference determination is based on a previous transmitted signal by the transmit antenna, and the coupling channel. The cross-talk interference is subtracted from a currently received signal by the receive antenna to obtain a residual signal. The residual signal is then transmitted as a next transmitted signal by the transmit antenna. | 02-24-2011 |
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| 20100326873 | PACKING CUSHION - A packing cushion includes a base and a plurality of sidewalls coupled to the base. The plurality of sidewalls interconnect with each other and cooperate with the base to form an accommodating space. A first and second cushion portions protrude from an inner surface of the base in the accommodating space. The first cushion portion comprises a first inclined surface, the second cushion portion comprises a second inclined surface. The second inclined surface is parallel to the first inclined surface. A contour defined by the first inclined surface matches with at least a part of an object packed in the packing cushion. When the object is packed in the accommodating space, the first inclined surface contacts with at least a part of the object to provided a first cushioning, and when the object is subjected to impact forces to deform the first cushion portion, the second inclined contacts with the object to provided a second cushion. | 12-30-2010 |
| 20100326874 | PACKING CUSHION - A packing cushion includes a base and a plurality of sidewalls coupled to the base. The plurality of sidewalls interconnect with each other and cooperate with the base to form an accommodating space. A first and second cushion portions protrude from an inner surface of the base and an inner surface of one of sidewalls respectively. The first cushion portion comprises a first surface. The second cushion portion comprises a second surface. A contour defined by the first surface matches with at least a part of an object to be packed. When the object is packed in the receiving space, the first surface contacts with at least a part of the object to provide a first cushioning, and when the object is subjected to an impact to deform the first cushion portion, the second surface contacts with the object to provide a second cushioning. | 12-30-2010 |
| 20110005964 | PACKING CUSHION - A packing cushion for packing an object and accessories thereof is provided. The packing cushioning includes a first packing portion, a second packing portion, and a third packing portion. The first packing portion defines a first accommodating space for receiving accessories of the object. The second and third packing portions are coupled to opposite ends of the first packing portion to corporately form a space. The space is opposite to the first accommodating space, and is configured to receive the object. | 01-13-2011 |
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| 20090322827 | DECREASED ACTUATION VOLTAGE IN MEMS DEVICES BY CONSTRAINING MEMBRANE DISPLACEMENT WITHOUT USING CONDUCTIVE "LANDING PAD" - The present application is directed to electrostatic actuators, and methods of making electrostatic actuators. In one embodiment, an electrostatic actuator of the present application can include an electrode layer and a mechanical member. The electrode layer can include a removed portion that is free of a landing pad. The mechanical member can be positioned in proximity to the electrode layer so as to provide a gap therebetween. The mechanical member can further include a dimple structure protruding out into the gap and aligned with the removed portion of the electrode layer. When in operation, the mechanical member can be capable of deflecting toward the electrode layer. The electrostatic actuator can be used in a fluid drop ejector for ink jet recording or printing devices. | 12-31-2009 |
| 20100321432 | INK JET PRINTING SYSTEMS AND METHODS WITH PRE-FILL AND DIMPLE DESIGN - Systems and methods of ejecting ink drops from an inkjet printer are disclosed. The systems and methods can include a printhead with one or more actuators with associated nozzles and membranes A voltage waveform can be applied to the actuators to fill the actuators with a volume of ink and eject the ink through the nozzles as ink drops. The voltage waveform can have associated pre-fill voltage to fill the actuator with ink and a firing voltage to eject the ink. The actuator membranes can have multi-height dimples to protect the membranes from contacting electrodes and reduce the electric field. | 12-23-2010 |
| 20110298866 | LOW-ADHESION COATING TO ELIMINATE DAMAGE DURING FREEZE/THAW OF MEMSJET PRINTHEADS - Exemplary embodiments provide materials, systems and methods for ink jet printhead, wherein a low-adhesion coating can be applied to at least one surface portion of an ink chamber within the printhead to reduce or eliminate actuator membrane damage during ink freeze/thaw cycles. | 12-08-2011 |
| 20110298870 | MULTIPLE PRIMING HOLES FOR IMPROVED FREEZE/THAW CYCLILNG OF MEMSJet PRINTING DEVICES - An ink jet print head includes an ink chamber defined by an electrostatically actuated membrane and a nozzle plate opposing the membrane. The nozzle plate includes a nozzle hole and a group of priming holes, the priming holes configured to maintain a substantially ink free surface on the nozzle plate during a freeze thaw cycle of ink in the ink chamber. A method for accommodating expansion and contraction of ink during a freeze thaw cycle of ink in an ink chamber is also provided. The method includes providing a group of priming holes in a nozzle plate of the ink chamber, the group of priming holes maintaining a substantially ink free surface on the nozzle plate during the freeze thaw cycle. | 12-08-2011 |
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| 20090161746 | RECEIVER ADJUSTMENT BETWEEN PILOT BURSTS - A receiver may train its equalizer using consecutive pilot bursts, divide the traffic between the consecutive pilot bursts into multiple sub-segments, and interpolate the trained equalizer coefficients to obtain the coefficients for equalizing one or more of the sub-segments. The receiver may also determine signal to interference and noise ratio (SINR) values based on each of the consecutive pilot bursts, and interpolate the SINR for decoding one or more of the sub-segments. The receiver may be an access terminal receiver operating in a code division multiple access (CDMA) cellular system. | 06-25-2009 |
| 20090196274 | FREQUENCY ERROR ESTIMATION - Aspects relate to frequency estimation and tracking. Frequency information is extracted based on an observation of a single symbol carrying pilot tones, which can be at any bandwidth location. Specifically, the frequency error information is extracted after selecting tones assigned to a specific user. The frequency error can be corrected based on the estimation. Further, the disclosed aspects can be applied to multi-path environments. | 08-06-2009 |
| 20090300458 | REVERSE LINK AUTOMATIC REPEAT REQUEST - An Access Network (AN) can send an acknowledge message (ACK) to an Access Terminal (AT) to indicate that the AN has successfully decoded the data received in the first set of slots of the first data packet. The AN can send a negative acknowledge message (NAK) to the AT to indicate that the AN has not successfully decoded the data received in the first set of slots of a first data packet. Based upon receipt of the NAK, the AT can resend the data by sending a second set of slots of the first data packet containing redundant data. Based upon receipt of the ACK, the AT can send a first set of slots of another packet. The AT can gate off for a predetermined period of time after sending the first set of slots of a first packet and before sending a next set of slots. | 12-03-2009 |
| 20100061496 | INTERFERENCE CANCELLATION FOR WIRELESS COMMUNICATIONS - Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation. | 03-11-2010 |
| 20100103904 | ENHANCED FORWARD LINK TRANSMISSION - A method for processing forward link channel signals generated by a CDMA base station includes time sharing by several mobile stations of spreading codes, which are orthogonal codes such as Walsh Code, and code-combining soft/softer handoff across sectors in the mobile station active set to increase dimensions on the CDMA2000 and WCDMA downlink while minimizing intra-sector interference. Since different parts of a packet or frame are transmitted to the user by the different base stations in the active set, earlier decoding and therefore early packet termination is enabled. | 04-29-2010 |
| 20100142479 | INTERFERENCE CANCELLATION FOR WIRELESS COMMUNICATIONS - Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation. | 06-10-2010 |
| 20100208639 | APPARATUS AND METHOD FOR TRANSMIT POWER SAVINGS - An apparatus and method for transmit power savings comprising determining a rate of a previous frame; determining if a current frame is an ALWAYS-ON frame, wherein the current frame temporally succeeds the previous frame; and either ignoring every other reverse link power control (RLPC) bits received on a forward power control subchannel (F-PCSCH) or applying every RLPC bits received on the F-PCSCH. In one aspect, the apparatus and method for transmit power savings comprising using a rate determination algorithm (RDA) to determine a rate of a previous frame; detecting a pilot gating pattern at the end of the previous frame; comparing the rate of the previous frame to a threshold; determining if a current frame is an ALWAYS-ON frame; and declaring the current frame to be a 0 bps frame and puncturing the F-PCSCH to a predetermined frequency. | 08-19-2010 |
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| 20090257607 | IMPLEMENTATION OF DIVERSITY ANTENNAS IN SMALL PORTABLE MEDIA DEVICES AND CELL PHONES - A mobile telecommunications apparatus includes a portable media device adapted to receive electronic data through a network, the portable media device comprising a first antenna adapted to receive electromagnetic signals of a particular frequency, the frequency is at least one of a radio frequency and a television (TV) frequency, and a headset in electrical communication with the portable media device and adapted to receive the electronic data through the network, the headset includes a switch coupled to the first antenna, a second antenna coupled to the switch, and a headset speaker comprising at least one of a mono headset speaker and a stereo headset speaker, the switch is adapted to combine operation of the first antenna and the second antenna into a dual operation diversity receiver. The network may comprise a Digital Video Broadcasting over Handheld (DVB-H) network. | 10-15-2009 |
| 20090262842 | Robust FFT Trigger Point Tracking for Echo Channels in OFDM Based Communication Systems - Identifying a trigger point of at least one OFDM decoder includes correlating a first time-domain sample of the at least one OFDM symbol with a second time-domain sample of the at least one OFDM symbol, processing the first time-domain sample and the second time-domain sample in the first moving average filter to determine a channel impulse response, comparing at least one correlation value of a first biggest path in the channel impulse response and a second biggest path in the channel impulse response, and determining a channel length of the channel impulse response based on a time duration of the channel impulse response. The OFDM decoder includes a first moving average filter and a second moving average filter. | 10-22-2009 |
| 20090268735 | Look-Up Table Based Approach for Layer Combining in ISDB-T and ISDB-TSB Receivers - A method of layer combining based on generating a look-up table in an Integrated Services Digital Broadcasting (ISDB) receiver includes obtaining a transmission parameter configuration, generating the look-up table based on the transmission parameter configuration, assembling a null transport stream packets and a valid transport stream packets from a plurality of layers of a multiplexing frame, and generating a completed transport packet stream using the look-up table. The receiver may generate the look-up table by at least one of generating the look-up table in real time or selecting from a look-up table set based on the transmission parameter configuration. The transmission parameter configuration may include at least one of a transmission mode, a guard interval, a modulation, and a coding rate. The look-up table may define an order of the null transport stream packets and the valid transport stream packets from the plurality of layers in the multiplexing frame. | 10-29-2009 |
| 20090268826 | Time Domain Based Approach for Fast Fading Channel FFT Trigger Point Tracking in ISDB Receivers - A method of fast fading channel Fast Fourier Transform (FFT) trigger point tracking in an integrated services digital broadcasting (ISDB) receiver includes inputting a signal in a fading channel including N Orthogonal Frequency Division Multiplexing (OFDM) symbols, determining an average correlation result of a current time-domain sample of the signal and a previous time-domain sample taken previously of the signal, accumulating the average correlation result for at least one of the OFDM symbols, determining a peak of the average correlation result to obtain a peak position, and identifying the peak position as a trigger point of the input signal. The peak position may be compared with a first trigger point to generate a trigger point error signal. The first trigger point may be set at the middle of a guard of an OFDM symbol to generate the trigger point error signal. | 10-29-2009 |
| 20090268850 | Coarse Frequency Offset Estimation in ISDB Receivers - A method of estimating a coarse frequency offset in a receiver includes providing at least one candidate frequency offset in Orthogonal Frequency-Division Multiplexing (OFDM) symbols having transmission and multiplexing configuration control (TMCC) bins and auxiliary channel (AC) bins, modulating the TMCC bins and AC bins using differential binary phase shift keying (DBPSK) modulation, estimating a phase difference between a first symbol and a second symbol for the candidate frequency offset of the TMCC and AC bins to obtain a resulting phase difference, correcting the resulting phase difference based on a difference between the candidate frequency offset and a Fast Fourier Transform (FFT) center bin to obtain a corrected phase difference, mapping the corrected phase difference to numeric numbers, and adding the numeric numbers for the candidate frequency offset to obtain a summation result. The numeric numbers correspond to at least one of +1 or −1. | 10-29-2009 |
| 20090285314 | ADAPTIVE FREQUENCY DOMAIN EQUALIZATION IN OFDM BASED COMMUNICATION SYSTEM - An apparatus, system, and method of performing adaptive frequency domain equalization in an Orthogonal Frequency Domain Multiplexing (OFDM) based communication system transmitting data information, wherein the method comprises receiving OFDM symbols comprising scattered pilots; obtaining channel estimates on every third bin of the scattered pilots in a frequency domain, wherein the channel estimates are obtained by performing an interpolation in a time domain across the received OFDM symbols; estimating an original channel based on the channel estimates, wherein the original channel in the time domain is estimated by applying a finite impulse response (FIR) low-pass filter in a frequency domain, wherein the FIR low-pass filter is adaptive according to a delay span of an original channel impulse response and is sufficiently wide to cover the delay span of the original channel impulse response; and dividing the received OFDM symbols by the channel estimate to obtain transmitted data information. | 11-19-2009 |
| 20090296843 | SEGMENTED-FRAME SYNCHRONIZATION FOR ISDB-T AND ISDB-TSB RECEIVER - A technique for segmented frame synchronization for Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) and Integrated Services Digital Broadcasting-Terrestrial Sound Broadcasting (ISDB-TSB) systems, wherein the method comprises receiving a wireless digital signal comprising an Orthogonal Frequency Division Multiplexing (OFDM) frame, further comprising ODFM symbols, in a receiver and wherein the receiver comprises a time de-interleaver, a bit de-interleaver, and a descrambler; filling memory of time de-interleaver and bit de-interleaver by the received wireless digital signal; determining an OFDM segmented frame boundary when memory of the time de-interleaver and bit de-interleaver are full; decoding bits from time de-interleaver and bit de-interleaver using a Viterbi decoder; outputting the Viterbi decoding bits from time de-interleaver and bit de-interleaver when the OFDM segmented frame boundary is detected; obtaining a segmented multiplexing frame boundary upon receipt of the first bit from the Viterbi decoder; and synchronizing the OFDM frame based on the segmented multiplexing frame boundary. | 12-03-2009 |
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| 20110107592 | HOLDING MECHANISM FOR ELECTRICAL CONNECTORS AND PCBS - A holding mechanism has a holding component including a base and a covering plate. The covering plate has two supporting pegs at two ends of a bottom thereof fixed on a top surface of the base, for forming a receiving chamber where a plurality of electrical connectors, with PCBs inserted therein, is arranged side by side. A stopping plate is capable of being driven to insert into and withdraw from the receiving chamber from a frontward direction, for resting front ends of the electrical connectors. A locking component is capable of moving frontward and rearward, and has a main body disposed rearward of the base. The main body has an upper portion protruded frontward to form a locking portion, for resting rear ends of the PCBs, and a plurality of pressing elements extending frontward above and beyond the locking portion, for pressing exposed top surfaces of the inserted PCBs. | 05-12-2011 |
| 20110127240 | AUTOMATIC SOLDERING MACHINE - An automatic soldering machine includes a frame assembly, an electric iron and a movable module fixed on the frame assembly. The movable module is used for making the electric iron connected with the movable module randomly move to a specified position at a predetermined area. The movable module includes a first driving unit having a first leading element movable along a first axis, a second driving unit having a second leading element movable along a second axis perpendicular to the first axis, a third driving unit having a third leading element movable along a third axis perpendicular to the first and second axis and a rotating unit capable of rotating around an axis thereof. The third driving unit is connected with the first leading element. The second driving unit is connected with the third leading element. The rotating unit is connected with the second leading element. | 06-02-2011 |
| 20110168526 | AUTOMATIC CONVEY DEVICE - An automatic convey device adapted for pushing and grouping a plurality of connectors includes a frame assembly, a holding module and a feeding module disposed on the frame assembly respectively. The holding module has a plurality of positioning units for positioning the connectors. The feeding module includes a power unit, a sliding unit disposed on the frame assembly, a plurality of pushing units and a grouping unit mounted to the sliding unit respectively. The pushing units are capable of repeatedly pushing the respective connectors move forward until the connectors are positioned by the positioning units and then move backward for repeating the last action to push the next connectors forward. The grouping unit is capable of repeating the action of pushing forward the connector positioned by the forward positioning unit and capable of being controlled by the power unit to disconnect with or connect with and push the corresponding connectors. | 07-14-2011 |
