Trellis Encoder Or Trellis Decoder Patents (Class 375/265)
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Patent number: 8804801Abstract: There is provided a peak suppressor including a first peak position detector to detect a first time when amplitude of a transmission signal changes in a convex manner and exceeds a specific level as a first peak position, a second peak position detector to detect a second time that is different by a predetermined time from the first peak position when the amplitude of the transmission signal exceeds the specific level as a second peak position, a suppression signal generator to generate a suppression signal for suppressing the amplitude of the transmission signal to a value that is equal to or lower than the specific level, based on amplitude and phase of the transmission signal corresponding to the first and second peak positions detected by the first and second peak position detectors, and an adder to add the suppression signal generated by the suppression signal generator to the transmission signal.Type: GrantFiled: October 24, 2012Date of Patent: August 12, 2014Assignee: Fujitsu LimitedInventor: Toshio Kawasaki
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Patent number: 8804794Abstract: Embodiments of methods, apparatuses and systems for transceiver processing are disclosed. One method includes a transceiver receiving a data stream from a link partner transceiver. A link parameter of a link between the transceiver and the link partner transceiver is determined. Allocation of transceiver processing between high-latency processing and low-latency processing is based at least in part on the link parameter.Type: GrantFiled: December 4, 2010Date of Patent: August 12, 2014Assignee: Aquantia CorporationInventors: Moshe Malkin, Jose Tellado, Frank McCarthy
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Patent number: 8798115Abstract: A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.Type: GrantFiled: November 22, 2013Date of Patent: August 5, 2014Assignee: Fujitsu LimitedInventors: Yi Wang, Yuantao Zhang, Hua Zhou, Jianming Wu
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Patent number: 8792594Abstract: Systems and methods for decoding block and concatenated codes are provided, including channel state information estimation such as by using optimum filter lengths based on channel selectivity and adaptive decision-directed channel estimation. These improvements enhance the performance of various communication systems and consumer electronics, including HD Radio receivers and systems.Type: GrantFiled: September 5, 2013Date of Patent: July 29, 2014Assignee: Digital PowerRadio, LLCInventors: Branimir R Vojcic, Hakan Dogan
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Patent number: 8791842Abstract: Embodiments of the present invention disclose a data decoding method and apparatus, relate to the field of wireless communications, and can improve a resource utilization rate in a decoding process, thereby improving decoding efficiency. The method of the present invention includes: dividing a to-be-decoded data transport block into N code blocks, where N is an integer greater than or equal to 2; and decoding the N code blocks in parallel according to a reverse direction of encoding. The present invention is applicable to data decoding.Type: GrantFiled: March 21, 2013Date of Patent: July 29, 2014Assignee: Huawel Technologies Co., Ltd.Inventors: Yafan Zhang, Jiaji Zhang
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Patent number: 8792587Abstract: A multi-transport stream (TS) generating apparatus and method, and digital broadcasting transmission and reception apparatuses and method are provided. The multi-TS generating apparatus includes an adaptor to generate an adaptation field in some packets of a normal stream; an interleaver to interleave the normal stream; a turbo processor to turbo-code a plurality of turbo streams; a stuffer to generate a multi-TS by stuffing the plurality of the turbo streams into the adaptation field; and a deinterleaver to deinterleave the multi-TS. Accordingly, the plurality of the turbo streams can be transmitted far more easily.Type: GrantFiled: October 30, 2008Date of Patent: July 29, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Jung-pil Yu
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Patent number: 8787430Abstract: A communication system is disclosed that allows high data-rate transmission of data between components. N-bit parallel data is transmitted in K-frequency separated channels on the transmission medium so as to fully take advantage of the overall bandwidth of the transmission medium. As a result, a very high data-rate transmission can be accomplished with low data-bit transmission on individual channels. A transmitter system and a receiver system are described for the communication system.Type: GrantFiled: September 14, 2009Date of Patent: July 22, 2014Assignee: Entropic Communications, Inc.Inventors: Sreen Raghavan, Thulasinath G. Manickam, Peter J. Sallaway
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Patent number: 8787500Abstract: A multi-transport stream (TS) generating apparatus and method, and digital broadcasting transmission and reception apparatuses and method are provided. The multi-TS generating apparatus includes an adaptor to generate an adaptation field in some packets of a normal stream; an interleaver to interleave the normal stream; a turbo processor to turbo-code a plurality of turbo streams; a stuffer to generate a multi-TS by stuffing the plurality of the turbo streams into the adaptation field; and a deinterleaver to deinterleave the multi-TS. Accordingly, the plurality of the turbo streams can be transmitted far more easily.Type: GrantFiled: October 30, 2008Date of Patent: July 22, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Jung-pil Yu
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Patent number: 8787347Abstract: Embodiments describe a varied transmission time interval in wireless communication system. According to some embodiments is a method for assigning a transmission time interval. The method can include measuring a channel condition and/or a data rate of packet communicated by at least one wireless device. Based in part on the data rate and/or channel condition information, a determination can be made whether to schedule a long transmission time interval or a short transmission time interval to the packet. A long transmission time interval can be scheduled if the channel condition is poor and/or there is a low data rate. A short transmission time interval can be scheduled if the channel condition is good and/or the data rate is high or fast. The method can be repeated for multiple wireless devices. Also included is an alternative interlacing structure that supports both long transmission time intervals and short transmission time intervals.Type: GrantFiled: February 19, 2009Date of Patent: July 22, 2014Assignee: Qualcomm IncorporatedInventors: Alexei Gorokhov, Edward Harrison Teague, Aamod Khandekar
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Patent number: 8787477Abstract: Embodiments of the invention provide a methods for the assignment of codewords to the available constellation points to minimize the Hamming distance between adjacent codewords. An hexagonal constellation is modeled as a two-dimensional trellis with an horizontal axis varying across a plurality of constellation points and a vertical axis varying across a plurality of codewords [0, 1, . . . , N?1]. A best path through the trellis is found to select a single constellation point per each codeword where a codeword is to be assigned. A each state in the transition across the trellis diagram, a current score and the best path that leads to the state is stored in a memory. Each codeword is assigned to the selected constellation point. The hexagonal constellation is used for transmitting data in a communication system.Type: GrantFiled: September 18, 2013Date of Patent: July 22, 2014Assignee: Texas Instruments IncorporatedInventors: Mohamed Farouk Mansour, Srinath Hosur, JuneChul Roh
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Patent number: 8787558Abstract: An apparatus comprising a processor configured to determine a power management (PM) state from a plurality of PM states for a digital subscriber line (DSL) transceiver, wherein the plurality of PM states comprise a idle state, a full on state, and a low power state, wherein the full on state consumes more power than the low power state, wherein the low power state consumes more power than the idle state, wherein the low power state comprises at least one PM profile, and wherein the DSL transceiver supports a very high speed digital subscriber line 2 (VDSL2) data transmission protocol, and instruct the DSL transceiver to use the PM state.Type: GrantFiled: August 3, 2012Date of Patent: July 22, 2014Assignee: Futurewei Technologies, Inc.Inventor: Sanjay Gupta
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Patent number: 8774290Abstract: A transmitter apparatus includes a reference signal transmitting unit that transmits a both of a first reference signal and a second reference signal differing from the first reference signal to a first receiver apparatus performing non-cooperative communication and to a second receiver apparatus performing cooperative communication, respectively. In addition, the transmitter apparatus includes a notifying unit that instructs the first receiver apparatus to measure the first reference signal and that instructs the second receiver apparatus to measure the second reference signal.Type: GrantFiled: May 31, 2010Date of Patent: July 8, 2014Assignee: Sharp Kabushiki KaishaInventors: Toshizo Nogami, Kazuyuki Shimezawa, Shohei Yamada, Wahoh Oh
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Patent number: 8774286Abstract: A receiving apparatus includes a buffer configured to store packets of a first packet sequence made up of packets extracted from one transport stream that are common to packets of another transport stream and packets of a second packet sequence made up of common packets, a read control section configured to read the packets of the first packet sequence and the second packet sequence stored in the buffer after the passing of a predetermined time after synchronization is established between the packets of the first packet sequence and the packets of the second packet sequence, thereby reconstructing one transport stream from the first packet sequence and the second packet sequence, and an output section configured to output the reconstructed transport stream.Type: GrantFiled: August 6, 2010Date of Patent: July 8, 2014Assignee: Sony CorporationInventors: Takashi Yokokawa, Satoshi Okada
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Patent number: 8767858Abstract: Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information.Type: GrantFiled: November 30, 2010Date of Patent: July 1, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Ui Kun Kwon, Tae Rim Park, Young Soo Kim, Eung Sun Kim
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Patent number: 8767851Abstract: Disclosed is a system and method for peak power reduction on a plurality of frequency domain orthogonal frequency divisional multiplexing (OFDM) signal carriers and a plurality of time domain signal carriers in a communications system. The system includes a plurality of frequency domain carrier processing blocks configured to iteratively perform frequency domain processing of at least one frequency domain OFDM signal carrier to reduce peak power transmission and a plurality of time domain carrier processing blocks configured to iteratively perform time domain processing of at least one time domain signal carrier to reduce peak power transmission, wherein the system is further configured to perform the frequency domain processing and time domain processing substantially simultaneously, thereby spreading excess peak power to one or more of the plurality of frequency domain OFDM signal carriers and to one or more of the plurality of time domain signal carriers.Type: GrantFiled: May 23, 2012Date of Patent: July 1, 2014Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Neil McGowan, Marthinus Willem Da Silveira
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Patent number: 8761284Abstract: Described herein are systems, apparatuses, and methods relating to a power-saving state or power-saving mode to facilitate clock synchronization between the two transceiver units and/or updating of DSL operation parameters during the power-saving state.Type: GrantFiled: November 26, 2012Date of Patent: June 24, 2014Assignee: Lantiq Deutschland GmbHInventors: Roland Zukunft, Rudi Frenzel
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Patent number: 8761293Abstract: Provided are a method and an apparatus for transmitting a feedback channel in a wireless communication system. User equipment measures a modulation-and coding scheme (MCS) level obtained by quantizing a carrier-to-interference-plus-noise ratio (CINR), maps feedback information including the MCS level to a feedback channel, and transmits the feedback channel.Type: GrantFiled: May 28, 2010Date of Patent: June 24, 2014Assignee: LG Electronics Inc.Inventors: Jin Young Chun, Su Nam Kim, Bin Chul Ihm
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Patent number: 8761318Abstract: A receiver system and method for recovering information from a symbol data sequence Y. The symbol data sequence Y corresponds to a symbol data sequence X that is transmitted onto the channel by a transmitter. The symbol data sequence X is generated by the transmitter based on associated information bits. At the receiver, a set of two or more processors operate in parallel on two or more overlapping subsequences of the symbol data sequence Y, where each of the two or more overlapping subsequences of the symbol data sequence Y corresponds to a respective portion of a trellis. The trellis describes redundancy in the symbol data sequence Y. The action of operating in parallel generates soft estimates for the associated information bits. The soft estimates are useable to form a receive message corresponding to the associated information bits.Type: GrantFiled: January 4, 2013Date of Patent: June 24, 2014Assignee: Coherent Logix, IncorporatedInventors: David B. Drumm, James P. Golab, Jan D. Garmany, Kevin L. Shelby, Michael B. Doerr
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Patent number: 8761316Abstract: Systems and methods for computing log likelihood ratios in a communication system are described. A demodulated symbol may be received. A set of scalars may be determined based on a modulation order, a signal-to-noise ratio for the symbol, and a bit of the symbol. At least one log likelihood ratio for the bit may be approximated using a piecewise linear process based on the scalars and the symbol.Type: GrantFiled: March 18, 2009Date of Patent: June 24, 2014Assignee: Qualcomm IncorporatedInventors: Raghu N. Challa, Hemanth Sampath, Sameer Vermani
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Patent number: 8761315Abstract: Systems and methods for decoding block and concatenated codes are provided, including channel state information estimation such as by using optimum filter lengths based on channel selectivity and adaptive decision-directed channel estimation. These improvements enhance the performance of various communication systems and consumer electronics, including HD Radio receivers and systems.Type: GrantFiled: September 5, 2013Date of Patent: June 24, 2014Assignee: Digital PowerRadio, LLCInventors: Branimir R Vojcic, Hakan Dogan
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Patent number: 8750422Abstract: A multi-transport stream (TS) generating apparatus and method, and digital broadcasting transmission and reception apparatuses and method are provided. The multi-TS generating apparatus includes an adaptor to generate an adaptation field in some packets of a normal stream; an interleaver to interleave the normal stream; a turbo processor to turbo-code a plurality of turbo streams; a stuffer to generate a multi-TS by stuffing the plurality of the turbo streams into the adaptation field; and a deinterleaver to deinterleave the multi-TS. Accordingly, the plurality of the turbo streams can be transmitted far more easily.Type: GrantFiled: October 30, 2008Date of Patent: June 10, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Jung-pil Yu
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Patent number: 8750407Abstract: A transmitter, channel coder, and method for coding and transmitting a sequence of symbols in a digital communication system utilizing soft pilot symbols. In one embodiment, the transmitter transmits a set of soft pilot symbols with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16 QAM or 64 QAM. The transmitter shares the modulation type and location (time/frequency/code) of the soft pilot symbols with a receiver. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols. In another embodiment, soft pilot symbols are inserted by low-level puncturing of channel encoded bits and replacing the punctured bits with known bit patterns.Type: GrantFiled: September 29, 2008Date of Patent: June 10, 2014Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Jung-Fu Cheng, Tracy Fulghum, Douglas Cairns
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Patent number: 8749352Abstract: A method for coded data transmission between a base station (10) and at least one transponder (20) within a wireless data transmission system (1), the method comprising the steps of: —providing a set of symbols (S1 . . . S2n) for encoding data (DD), wherein the set of symbols (S1 . . . S2n) is divided into at least two sub-sets (SS1, SS2), and wherein each symbol (S1 . . . S2n) of the complete set is assigned to one of said at least two sub-sets (SS1, SS2); —encoding said data (DD) using symbols (S1 . . . S2n) of said at least two sub-sets (SS1, SS2), wherein at least one encoded symbol (S1 . . . S2n) comprises several bits; —transmitting each encoded symbol (S1 . . . S2n) within a symbol duration (SD) of an encoded data signal (DS) between said base station (10) and at least one transponder (20), wherein the sub-set (SS1, SS2) assigned to each encoded symbol (S1 . . . S2n) is indicated by a value of at least one bit (LB) of each encoded symbol (S1 . . .Type: GrantFiled: August 3, 2007Date of Patent: June 10, 2014Assignee: NXP, B.V.Inventors: Harald Witschnig, Johannes Bruckbauer, Elisabeth Sonnleitner
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Patent number: 8750348Abstract: Methods and apparatuses for acquiring a satellite signal includes generating a differential code using first, second and third segments of a satellite signal received from a positioning satellite, obtaining a correlation value by performing a correlation using the differential code and a replica of the spreading code, and acquiring the satellite signal using the correlation value. The differential code is generated by performing a differential operation on a spreading code from the positioning satellite.Type: GrantFiled: May 15, 2013Date of Patent: June 10, 2014Assignee: Seiko Epson CorporationInventors: Yoshitaka Yamagata, Norio Teruuchi
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Patent number: 8750428Abstract: The method is based on a signal interval (DB) which comprises a first part (ET) (which is modulated using a first modulation method (GFSK)) of the signal interval and a second part (which is modulated using a second modulation method (DMPSK)) of the signal interval. The channel parameters (c(i)) relating to the second part (which is modulated using the second modulation method) of the signal interval are determined using a received data signal (a(i); p(i)) from the first part (ET) of the signal interval (DB).Type: GrantFiled: April 10, 2006Date of Patent: June 10, 2014Assignee: Intel Mobile Communications GmbHInventors: Markus Hammes, André Neubauer, Michael Speth
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Patent number: 8750433Abstract: A demodulation circuit includes a hard decision process unit and a soft decision process unit. The hard decision process unit is configured to perform a hard decision process using a demodulated signal, and the demodulated signal is a demodulated received signal. The soft decision process unit is configured to determine a range of assignment with respect to a transitioning part in the demodulated signal, calculate a likelihood value of a bit, and perform a soft decision process.Type: GrantFiled: April 9, 2012Date of Patent: June 10, 2014Assignee: Fujitsu LimitedInventors: Naoto Adachi, Masataka Umeda
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Patent number: 8744007Abstract: A multi-transport stream (TS) generating apparatus and method, and digital broadcasting transmission and reception apparatuses and method are provided. The multi-TS generating apparatus includes an adaptor to generate an adaptation field in some packets of a normal stream; an interleaver to interleave the normal stream; a turbo processor to turbo-code a plurality of turbo streams; a stuffer to generate a multi-TS by stuffing the plurality of the turbo streams into the adaptation field; and a deinterleaver to deinterleave the multi-TS. Accordingly, the plurality of the turbo streams can be transmitted far more easily.Type: GrantFiled: October 30, 2008Date of Patent: June 3, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Jung-pil Yu
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Patent number: 8744008Abstract: A multi-transport stream (TS) generating apparatus and method, and digital broadcasting transmission and reception apparatuses and method are provided. The multi-TS generating apparatus includes an adaptor to generate an adaptation field in some packets of a normal stream; an interleaver to interleave the normal stream; a turbo processor to turbo-code a plurality of turbo streams; a stuffer to generate a multi-TS by stuffing the plurality of the turbo streams into the adaptation field; and a deinterleaver to deinterleave the multi-TS. Accordingly, the plurality of the turbo streams can be transmitted far more easily.Type: GrantFiled: October 30, 2008Date of Patent: June 3, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Jung-pil Yu
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Patent number: 8743984Abstract: Systems and methods are disclosed with a spatial-domain-based multi-dimensional coded-modulation scheme that improves dramatically OSNR sensitivity and tolerance to fiber nonlinearities by using D-dimensional signal constellations, where D=2(2+M)N. The factor 2 originates from two polarizations, 2+M electrical basis functions are selected (2 in-phase/quadrature channels and M pulse-position like basis functions), and N represents the number of orbital angular momentum (OAM) states used in FMFs/MMFs. For single mode fiber applications N is 1.Type: GrantFiled: April 6, 2012Date of Patent: June 3, 2014Assignee: NEC Laboratories America, Inc.Inventors: Ivan B. Djordjevic, Lei Xu, Ting Wang
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Patent number: 8744018Abstract: Certain embodiments provide methods that may allow for improvements in performance and power consumption by terminating the turbo decoding process early when one of at least two test criterion is satisfied in communications systems, including UMTS, WCDMA, and TD-DCMA.Type: GrantFiled: April 5, 2012Date of Patent: June 3, 2014Assignee: QUALCOMM IncorporatedInventors: Jinghu Chen, Wanlun Zhao, Mingxi Fan, Fuyun Ling, Peter John Black
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Patent number: 8744014Abstract: A FFR (fractional frequency reuse)-based network MIMO (multiple-input multiple-output) transmission architecture in a cellular system that employs cell sectoring using directional antennas. Each cell is sectorized into three outer sectors using three directional antennas which transmit in three different directions using three different frequency subbands. The cell sectors are arranged based on a frequency partition scheme so that three sectors in three neighboring cells form a coordinated group for network MIMO transmission. A regular and a rearranged frequency partition are described. Further, a practical implementation of SON (self organizing network)-based three-cell FFR-based network MIMO for a wireless OFDM system is described.Type: GrantFiled: April 23, 2010Date of Patent: June 3, 2014Assignee: Mediatek Inc.Inventors: Chu-Jung Yeh, Li-Chun Wang, I-Kang Fu
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Patent number: 8743999Abstract: The present invention provides a digital signal processor, a communication system comprising such a digital signal processor and a method for operating such a digital signal processor. The digital signal processor for a communication system in an aircraft cabin of an aircraft comprises a provision means for providing a predeterminable digital signal suitable for forming a respective wave form for mapping a respective pre-determined service signal and a pre-determined noise signal.Type: GrantFiled: March 28, 2011Date of Patent: June 3, 2014Assignee: Airbus Operations GmbHInventor: Martin Schirrmacher
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Patent number: 8737435Abstract: An encoder includes a precoder for encoding an input information object according to a preset encoding scheme and storing the encoded information object in a precoder buffer, a sample number/address generation unit for generating a sample number of each sample and an address, which corresponds to each bit of each sample and the address of the precoder buffer, a multiplexer for selecting a bit of the precoder buffer corresponding to the address generated by the sample number/address generation module, a sampling buffer for storing a bit of each sample output from the multiplexer, a control packet generation module for generating a control packet including information on the sample number generated by the sample number/address generation module, a packet assembling unit for assembling the sample stored in the sampling buffer with the control packet generated by the control data generation module, and a modulation module for modulating the packet output from the packet assembling unit into a sound signal accordiType: GrantFiled: May 18, 2010Date of Patent: May 27, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Hee-Won Jung, Seung-Gun Park, Gi-Sang Lee, Jun-Ho Koh, Sang-Mook Lee, Sergey Zhidkov
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Patent number: 8731107Abstract: Good transmission characteristics are achieved in the presence of fading with a transmitter that employs a trellis coder followed by a block coder. Correspondingly, the receiver comprises a Viterbi decoder followed by a block decoder. Advantageously, the block coder and decoder employ time-space diversity coding which, illustratively, employs two transmitter antennas and one receiver antenna.Type: GrantFiled: November 30, 2012Date of Patent: May 20, 2014Assignee: AT&T Mobility II LLCInventors: Siavash Alamouti, Patrick Poon, Vahid Tarokh
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Publication number: 20140133593Abstract: In order to generate multiple-access signals, each transmitter transmits information by using all or a part of channel resources. The signal of each transmitter is mapped to an OFDM time-frequency resource space as a trellis modulation path. A mobile communication system maps trellis modulation paths of a plurality of transmitters to the same resource space. In order to effectively detect and distinguish signals of a plurality of transmitters transmitted through the same channel resource space, a receiver uses a message passing method between symbols and a path connection method. The receiver uses a state space expansion method, a backward pre-decoding method, and a successive interference cancellation method to more efficiently reconstruct a discovery signal.Type: ApplicationFiled: November 8, 2013Publication date: May 15, 2014Applicants: Research & Business Foundation Sungkyunkwan University, Samsung Electronics Co., LtdInventors: Chi-Woo Lim, Sang-Hyo Kim, Min Jang, Jin-Hwan Kang, Kyung-Kyu Kim, Dae-Gyun Kim, Hyun-Seok Ryu, Seung-Hoon Park, Seung-Sik Shin
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Patent number: 8724728Abstract: Provided is a method of generating an adaptive codebook and a multiple input multiple output (MIMO) communication system using the adaptive codebook. A transmitter and a receiver may generate, from a base codebook based on a matrix associated with statistics of a channel matrix, the adaptive codebook maintaining a unitary characteristic. The transmitter may perform scheduling, transmit filter design, and precoding using adaptive codebook based feedback information.Type: GrantFiled: December 1, 2010Date of Patent: May 13, 2014Assignees: Samsung Electronics Co., Ltd., Purdue Research FoundationInventors: Jun Il Choi, Bruno Clerckx, Ki Il Kim, David J. Love, Taejoon Kim
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Patent number: 8718165Abstract: Multi-antenna transmission control presented herein involves generating a set of virtual channel realizations at the transmitter that shares the same second-order statistics as the actual channel realizations observed for a targeted receiver. By making the control-related quantities of interest at the transmitter depend on the long-term statistics of the channel, the actual channel realizations are not needed for transmission control, e.g., for accurate Multiple-Input-Multiple-Output (MIMO) preceding. As such, the use of virtual channel realizations enables transmission control that approaches the “closed-loop” channel capacity that would be provided by full feedback of the (instantaneous) actual channel realizations, without requiring the overhead signaling burden that attends full feedback.Type: GrantFiled: June 14, 2007Date of Patent: May 6, 2014Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Dennis Hui, Leonid Krasny
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Patent number: 8719658Abstract: A method for accessing extrinsic information in a turbo decoder is disclosed. Operation phases for Forward State Metric Calculators (FSMCs) and Reverse State Metric Calculators (RSMCs) in multiple maximum a posteriori probability (MAP) decoders are misaligned differently based on whether a current half iteration is even or odd. First extrinsic information is read from a memory into the FSMCs and RSMCs using the misaligned operation phases. Second extrinsic information is determined using the MAP decoders. Each row of the second extrinsic information is stored to a different bank in the memory using the misaligned operation phases.Type: GrantFiled: September 9, 2010Date of Patent: May 6, 2014Assignee: QUALCOMM IncorporatedInventors: Zhiqiang Cui, Iwen Yao, Qiang Huang
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Patent number: 8718194Abstract: Aspects of the present disclosure describe an efficient channel estimation algorithm for high-speed processing of dedicated reference signals. The channel estimation algorithm may utilize one or more compressed interpolation matrices. The compressed interpolation matrices may be selected based on the Doppler value and signal to noise ratio (SNR) of the channel.Type: GrantFiled: November 29, 2010Date of Patent: May 6, 2014Assignee: QUALCOMM IncorporatedInventors: Dung Ngoc Doan, Tao Luo, Taesang Yoo, Yongbin Wei, Xiaoxia Zhang
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Patent number: 8711960Abstract: A digital broadcasting system including a transmitting system and a receiving system, and a method of processing data are disclosed. A method of processing data of a transmitting system includes sequentially grouping N number of columns (Kc) configured of A number of enhanced data bytes having information included therein, thereby creating a frame having a size of N (rows)*Kc (columns), wherein N and A are integers, encoding the created frame, and multiplexing and transmitting enhanced data included in the encoded frame and main data.Type: GrantFiled: September 21, 2011Date of Patent: April 29, 2014Assignee: LG Electronics Inc.Inventors: Hyoung Gon Lee, In Hwan Choi, Byoung Gill Kim, Won Gyu Song, Jong Moon Kim, Jin Woo Kim
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Patent number: 8711987Abstract: The present invention relates to a method in a receiver for decoding at least two received communication signals, wherein the communication signals are modulated, pre-coded by a discrete Fourier transform and transmitted by means of single-carrier frequency division multiple access scheme (SC-FDMA). The method comprises the steps of: performing an antenna combining and equalization on a signal observed at the receiver; performing inverse discrete Fourier transform on a model of the observed signal; whitening a time domain model of the observed signal; and jointly detecting the received at least two communication signals by performing soft value calculations based on maximum likelihood detection of a whitened time domain model using a whitened time domain channel estimate.Type: GrantFiled: April 16, 2009Date of Patent: April 29, 2014Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Henrik Sahlin, Ulf Lindgren, Peter Naucler, Chester Park
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Patent number: 8711956Abstract: A communications system may include a first communications device that may include a transmitter and a modulator cooperating therewith to modulate a coded waveform using a constant phase modulation (CPM) to generate a non-linear CPM waveform, and generate a linear representation of the non-linear CPM waveform, the linear representation including a plurality of pulses. The transmitter and a modulator may further cooperate to remove at least some of the plurality of pulses to define a modified linear representation of the non-linear CPM waveform, and transmit the modified linear representation of the non-linear CPM waveform. The communications system may further include a second communications device that may include a receiver and a single pulse-matched filter linear demodulator cooperating therewith to demodulate the modified linear representation of the non-linear CPM waveform transmitted from the first communications device.Type: GrantFiled: February 7, 2011Date of Patent: April 29, 2014Assignee: Harris CorporationInventor: Michael A. Wadsworth
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Patent number: 8705666Abstract: In one aspect there is provided a method. The method may include receiving a signal transmitted through a channel; receiving an estimate of the channel; determining from the estimate of the channel at least one statistic representative of a variability of the estimate of the channel; decoding the received signal by at least searching for an output using a plurality of cost metrics determined based on at least the estimate of the channel and the at least one statistic; and providing, based on at least one of the plurality of cost metrics, the output. Related apparatus, systems, methods, and articles are also described.Type: GrantFiled: April 4, 2011Date of Patent: April 22, 2014Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Boon Sim Thian, Andrea Goldsmith
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Patent number: 8705669Abstract: In various aspects, the disclosure describes systems and methods for decoding of convolutionally encoded signals representing, for example, telecommunications signals such as command or content signals used in digital telecommunications. In various embodiments such aspects of the disclosure provide systems and methods for improving the efficiency, speed, and power consumption of such processes by providing architectures and methods for processing various parts of the encoded data records in parallel, using multiple and optionally specially-designed, dedicated memory registers and multiplexers.Type: GrantFiled: March 19, 2013Date of Patent: April 22, 2014Assignee: BlackBerry LimitedInventor: Martin Kosakowski
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Patent number: 8707121Abstract: A forward error correction encoding method includes: separating a first header section from an inputted packet stream; generating a second payload section by encoding a first payload section of the packet stream, from which the first header section is separated, according to a preset code rate; generating a second header section according to the code rate; and combining the first header section, the second header section, and the second payload section.Type: GrantFiled: June 26, 2013Date of Patent: April 22, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Sung-Hoon Kim, Jin-Soo Choi, Jin-Woo Hong, Yongsoek Kim, Ho-Kyoung Lee, Jin-Woong Kim, Chang-Joong Kim
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Patent number: 8705590Abstract: A demodulation reference signal generator includes a non-correlation sequence generator to generate a non-correlation sequence for RS of a first resource block; a first spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; a second spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, using a second group of Codes; the first and second frequency resources are adjacent frequency resources used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and a mapping unit to map the spectrum-spread elements to the first and second frequency resources.Type: GrantFiled: July 9, 2012Date of Patent: April 22, 2014Assignee: Fujitsu LimitedInventors: Yi Wang, Yuantao Zhang, Hua Zhou, Jianming Wu
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Patent number: 8705668Abstract: A node comprising a receiver for i) receiving at least two signals streams comprising bit sequences and ii) evaluating which bit sequence that is most likely to have been received for a certain sent symbol for each signal stream. The receiver for calculating metrics indicative of which bit sequence that initially is most likely to correspond to a certain sent symbol, the metrics being used a soft value calculation where the receiver is arranged for addition of metric data for a certain signal stream corresponding to an added bit sequence for each case where the available metrics are incomplete for performing the estimation. The missing bit is inserted in the added bit sequence and chosen such that it corresponds to a symbol with the shortest Euclidian distance to the symbol with the said corresponding bit sequence initially being indicated as most likely to correspond to a certain sent symbol.Type: GrantFiled: September 25, 2009Date of Patent: April 22, 2014Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventor: Henrik Sahlin
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Patent number: 8699612Abstract: Techniques are described herein that receive communications transmitted according to different operation modes at a multi-mode, programmable receiver system. The multi-mode, programmable receiver system may receive communication signals from transmit antennas in “cells” (e.g., base station transceivers and/or the like) according to one or more operation modes, using receive antennas. The received signals may be converted and processed by various modules of the multi-mode, programmable receiver system to produce an output signal. The multi-mode, programmable receiver system includes modules that are programmable to be selectively enabled or disabled according to an operation mode in accordance with which the multi-mode, programmable receiver system operates.Type: GrantFiled: October 22, 2012Date of Patent: April 15, 2014Assignee: Broadcom CorporationInventor: Fu-Hsuan Chiu
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Patent number: 8699600Abstract: A frequency and data synchronization control system through the 8VSB SFN DTx modulation prevents the deterioration of the digitally broadcasted receiving sensitivity caused by a discrepancy of the frequency or data between the receiver of the digital broadcasting signal and the distributed translator or between distributed translators.Type: GrantFiled: February 23, 2011Date of Patent: April 15, 2014Assignee: K-Tech Telecommunications, IncInventor: Steve Kuh
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Patent number: 8694877Abstract: A modified soft output Viterbi algorithm (SOVA) detector receives a sequence of soft information values and determines a best path and an alternate path for each soft information value and further determines, when the best and alternate paths lead to the same value for a given soft information value, whether there is a third path departing from the alternate path that leads to an opposite decision with respect to the best path for a given soft information value. The SOVA detector then considers this third path when updating the reliability of the best path. The modified SOVA detector achieves max-log-map equivalence effectively through the Fossorier approach and includes modified reliability metric units for the first N stages of the SOVA detector, where N is the memory depth of a given path, and includes conventional reliability metric units for the remaining stages of the detector.Type: GrantFiled: October 1, 2010Date of Patent: April 8, 2014Assignee: STMicroelectronics, Inc.Inventors: Sivagnanam Parthasarathy, Lun Bin Huang, Alessandro Risso