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21.
公开(公告)号:US20180041306A1
公开(公告)日:2018-02-08
申请号:US15280215
申请日:2016-09-29
发明人: Jung Hyun BAE , Dongwoon BAI , Jungwon LEE
IPC分类号: H04L1/00 , H04J11/00 , H04B17/318 , H04B7/04
CPC分类号: H04L1/0054 , H04B7/0413 , H04B7/0417 , H04B7/0456 , H04B17/318 , H04B17/345 , H04J11/003 , H04L1/0003 , H04L1/0038 , H04L1/0048 , H04L1/0606 , H04L27/0012
摘要: A method and apparatus are provided. The method includes receiving a desired signal from a serving base station, receiving a plurality of interfering signals from one or more base stations, estimating a maximum likelihood (ML) decision metric of interfering signals, applying a logarithm function to the ML decision metric, and applying a maximum-log approximation function to a serving data vector and an interference data vector, which are included in the ML decision metric, determining the values of a transmit power, a rank, a precoding matrix, a modulation order and a transmission scheme using the applied ML decision metric, and cancelling the interfering signals from the received signals using the determined values of transmit power, rank, precoding matrix, modulation order and transmission scheme.
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公开(公告)号:US09887805B2
公开(公告)日:2018-02-06
申请号:US15199418
申请日:2016-06-30
发明人: Simon Litsyn , Noam Presman
CPC分类号: H04L1/0045 , H03M13/3746 , H03M13/45 , H04L1/0047 , H04L1/0054 , H04L1/0057 , H04N9/8047 , H04N19/60
摘要: A device, system and method for decoding. A noisy version of an error correction codeword may be received, for example, over a noisy communication channel or retrieved from a memory device (e.g. a flash memory device). One or more symbol probabilities may be transformed, from an initial domain to a transformed domain, the symbol probabilities being one or more individual symbols of the received error correction codeword were transmitted as one or more symbols in candidate transmitted error correction codewords. In the transformed domain, a plurality of the transformed symbol probabilities may be composed to generate a combined coset probability defining the likelihood that the transmitted error correction codeword is associated with the individual symbols belongs to a particular one of a plurality of candidate cosets. A plurality of the coset probabilities for the plurality of respective cosets may be inverse transformed from the transformed domain to the initial domain.
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公开(公告)号:US09871623B2
公开(公告)日:2018-01-16
申请号:US15153842
申请日:2016-05-13
CPC分类号: H04L1/0054 , H04L1/006 , H04L1/0063
摘要: A Viterbi decoding apparatus includes a main decoder, a re-encoder, an adjusting module, a secondary decoder and a secondary result generating module. The main decoder performs a Viterbi decoding process on input data to generate a set of main decoded results. The re-encoder performs a convolutional encoding process on the set of main decoded results to generate a set of re-encoded results. The adjusting module adjusts the input data according to the set of re-encoded results to generate adjusted input data corresponding to a predetermined path in a Viterbi trellis diagram. The secondary decoder generates a plurality of symbols according to the adjusted input data. The secondary result generating module generates a set of secondary decoded results according to the plurality of symbols and the set of main decoded results.
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公开(公告)号:US20180013868A1
公开(公告)日:2018-01-11
申请号:US15619115
申请日:2017-06-09
CPC分类号: H04L69/324 , H03M13/09 , H03M13/2906 , H03M13/3738 , H03M13/3746 , H03M13/3753 , H03M13/4115 , H03M13/4123 , H03M13/413 , H03M13/4169 , H03M13/6502 , H04L1/0054 , H04L1/0059 , H04L1/0061 , H04L43/16 , H04W72/0466 , H04W72/085
摘要: Certain aspects of the present disclosure relate to techniques and apparatus for increasing decoding performance and/or reducing decoding complexity. A transmitter may divide data of a codeword into two or more sections and then calculate redundancy check information (e.g., a cyclic redundancy check or a parity check) for each section and attach the redundancy check information to the codeword. A decoder of a receiver may decode each section of the codeword and check the decoding against the corresponding redundancy check information. If decoding of a section fails, the decoder may use information regarding section(s) that the decoder successfully decoded in re-attempting to decode the section(s) that failed decoding. In addition, the decoder may use a different technique to decode the section(s) that failed decoding. If the decoder is still unsuccessful in decoding the section(s), then the receiver may request retransmission of the failed section(s) or of the entire codeword.
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公开(公告)号:US09848384B2
公开(公告)日:2017-12-19
申请号:US15041316
申请日:2016-02-11
CPC分类号: H04W52/0229 , H04L1/0042 , H04L1/0045 , H04L1/0053 , H04L1/0054 , H04L1/20 , H04L5/0007 , Y02D70/142
摘要: Apparatuses, methods, apparatuses, and systems for of selectively deactivating portions of a receiver based on dynamic measurements are disclosed. One embodiment of a method includes receiving, by the receiver, a wireless signal, identifying a packet within the wireless signal, determining whether the packet cannot be decoded with a reliability greater than a threshold, and powering down at least a portion of the receiver after determining that the packet cannot be decoded with the reliability greater than the threshold.
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公开(公告)号:US20170359206A1
公开(公告)日:2017-12-14
申请号:US15589547
申请日:2017-05-08
发明人: Aki OYA , Masataka IMAO
CPC分类号: H04L25/08 , H04L1/0054 , H04L27/20 , H04L27/22 , H04L69/22
摘要: Provided are a reception device, a reception method and a transmission reception system capable of reducing the influence of distortion in a received signal and achieving high demodulation performance without performing a computation process having a great amount of calculations. The reception device receives a signal containing a known signal part and a data part, and includes a conversion unit that converts the signal received by a reception unit into a digital signal, a region determination unit that determines a nonuse region which is a periodic region containing distortion in the digital signal, on a basis of a first digital signal in the known signal part contained in the digital signal and a known signal held in advance, and a demodulation unit that performs demodulation on the digital signal by using a second digital signal in a region other than the nonuse region in the digital signal.
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公开(公告)号:US20170359146A1
公开(公告)日:2017-12-14
申请号:US15592519
申请日:2017-05-11
IPC分类号: H04L1/00
CPC分类号: H04L1/0054 , H03M13/4115 , H04L1/005
摘要: The described techniques relate to improved methods, systems, devices, or apparatuses that support enhanced efficiency in list Viterbi algorithm (LVA) decoding using iterative comparison trellis construction. Iterative comparison may involve comparison and selection from ordered accumulated path metrics associated with feeding transitions by selecting, for each successive rank of an ordered path metrics list for the current stage, the best unselected accumulated path metric of the feeding transitions. The iterative comparison may be performed sequentially for each stage before processing the next stage. Alternatively, the iterative comparison may be pipelined across stages, and different ranks of the ordered path metrics lists for different stages may be concurrently computed in a single trellis search cycle using multiple comparators. Iterative comparison may be used in an inner decoder to generate an ordered path metrics list for processing according to an error checking function using an outer decoder.
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公开(公告)号:US20170353271A1
公开(公告)日:2017-12-07
申请号:US15395713
申请日:2016-12-30
CPC分类号: H04L1/0063 , H03M13/09 , H03M13/098 , H03M13/13 , H03M13/3738 , H03M13/3977 , H03M13/612 , H04L1/0041 , H04L1/0045 , H04L1/0054 , H04L1/0057 , H04L1/0061
摘要: Certain aspects of the present disclosure relate to techniques and apparatus for improving decoding latency and performance of Polar codes. An exemplary method generally includes generating a codeword by encoding information bits, using a multi-dimensional interpretation of a polar code of length N, determining, based on one or more criteria, a plurality of locations within the codeword to insert error correction codes generating the error correction codes based on corresponding portions of the information bits, inserting the error correction codes at the determined plurality of locations, and transmitting the codeword. Other aspects, embodiments, and features are also claimed and described.
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公开(公告)号:US20170353204A1
公开(公告)日:2017-12-07
申请号:US15683549
申请日:2017-08-22
申请人: INTEL CORPORATION
发明人: Hong HE , Seunghee HAN , Jong-Kae FWU , Debdeep CHATTERJEE , Rui HUANG
IPC分类号: H04B1/12 , H04B17/26 , H04B17/345 , H04B1/3827 , H04B17/24 , H04W84/18 , H04W76/04 , H04W76/02 , H04W72/12 , H04W72/08 , H04W72/04 , H04W52/40 , H04W52/02 , H04W36/10 , H04W24/10 , H04W24/02 , H04L25/03 , H04L25/02 , H04L5/00 , H04L1/18 , H04L1/00 , H04J11/00 , H04B7/155 , H04B7/06 , H04B7/0452 , H04W92/18 , H04W84/04 , H04L27/00
CPC分类号: H04B1/12 , H04B1/3827 , H04B7/0452 , H04B7/0617 , H04B7/15557 , H04B17/24 , H04B17/26 , H04B17/345 , H04J11/005 , H04J11/0053 , H04L1/0003 , H04L1/0054 , H04L1/1854 , H04L1/1867 , H04L5/0007 , H04L5/0048 , H04L5/0053 , H04L5/0055 , H04L5/0057 , H04L5/0058 , H04L5/0092 , H04L25/0202 , H04L25/0206 , H04L25/03305 , H04L27/0008 , H04W24/02 , H04W24/10 , H04W36/10 , H04W40/16 , H04W52/0261 , H04W52/40 , H04W72/0406 , H04W72/042 , H04W72/048 , H04W72/0486 , H04W72/08 , H04W72/082 , H04W72/12 , H04W72/1205 , H04W72/121 , H04W72/1242 , H04W72/1247 , H04W76/14 , H04W76/27 , H04W76/28 , H04W84/042 , H04W84/18 , H04W92/18 , Y02D70/00 , Y02D70/1224 , Y02D70/1226 , Y02D70/1242 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/164 , Y02D70/21 , Y02D70/24
摘要: Disclosed is a User Equipment device configured to select a suitable acknowledgement timing configuration in a time division duplex-frequency division duplex (TDD-FDD) carrier aggregation (CA) enabled wireless network, comprising establishing, by a user equipment (UE), a connection to a primary serving cell (PCell) and a secondary serving cell (SCell) of a base station, the PCell having a first TDD or first FDD configuration, the SCell having a second FDD or second TDD configuration, receiving, by the UE, downlink data through the PCell and SCell, categorizing a type of downlink data subframe in use by the SCell, selecting, by the UE, a hybrid automatic repeat request (HARQ) timing configuration based on the type of downlink data subframe for use by the SCell, and transmitting acknowledgement information associated with the downlink data according to the selected hybrid automatic repeat request (HARQ) timing configuration on PCell. Other embodiments may be described and claimed.
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公开(公告)号:US09819419B2
公开(公告)日:2017-11-14
申请号:US14877544
申请日:2015-10-07
申请人: ZTE Corporation
发明人: Yi Cai , Zhensheng Jia , Jianjun Yu
CPC分类号: H04B10/612 , H04B10/613 , H04B10/6161 , H04L1/0054 , H04L25/03203 , H04L2025/0342
摘要: In a receiver of Quadrature Amplitude Modulation (QAM) signal, the received QAM signal is divided into multiple Quadrature Phase Shift Keying (QPSK) symbol streams. A Maximum Likelihood Symbol Estimation (MLSE) is performed on each QPSK symbol stream to recover information bits in the received QAM signal. In one advantageous aspect, complexity of implementation can be reduced by performing MLSE on QPSK signals instead of QAM signals.
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