公开(公告)号：US20170257204A1

公开(公告)日：2017-09-07

申请号：US15600525

申请日：2017-05-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dai Shi ,  Wenting Guo ,  Lei Lu

IPC: H04L5/00 ,  H04J11/00 ,  H04W72/04

CPC classification number: H04L5/0048 ,  H04B7/06 ,  H04J11/0053 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/0035 ,  H04L1/005 ,  H04L1/20 ,  H04L5/0003 ,  H04L5/0035 ,  H04L5/0094 ,  H04W72/042 ,  H04W88/08

Abstract: A method for determining a modulation and coding scheme is disclosed. The method is performed by a network device. The method includes: determining a quantity K of terminal devices that reuse a first time-frequency resource in a first time period to receive downlink data from the network device, where K≧2; obtaining a channel quality indicator (CQI), where the CQI is determined according to a signal to interference plus noise ratio (SINR) of a channel and the quantity K of the terminal devices, where the channel is a channel based on the first time-frequency resource, and the channel is used to transmit downlink data between a first terminal device and the network device in the first time period; and determining a Modulation and Coding scheme (MCS) of the first terminal device according to the CQI.

公开(公告)号：US20170257188A1

公开(公告)日：2017-09-07

申请号：US15393378

申请日：2016-12-29

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kentaro TANIGUCHI ,  Tsuguhide AOKI

IPC: H04L1/08 ,  H04L1/18 ,  H04L1/00

CPC classification number: H04L1/08 ,  H04L1/0045 ,  H04L1/005 ,  H04L1/0054 ,  H04L1/0055 ,  H04L1/0061 ,  H04L1/1864

Abstract: According to one embodiment, an integrated circuit receives first packet scrambled with a first scrambling seed and second packet scrambled with a second scrambling seed, generates inversion data, generate third likelihood information by inverting signs of the first likelihood information or the second likelihood information based on the inversion data, and generates fourth likelihood information based on the third likelihood information and the second or first likelihood information.

公开(公告)号：USRE46527E1

公开(公告)日：2017-08-29

申请号：US14548049

申请日：2014-11-19

Applicant: LG ELECTRONICS INC.

Inventor： Won Gyu Song ,  Byoung Gill Kim ,  Hyoung-Gon Lee ,  In Hwan Choi ,  Jin Woo Kim

IPC: H04H20/71 ,  H03C1/52 ,  H04L1/00

CPC classification number: H04L1/0071 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L1/007 ,  H04L1/0072

Abstract: A transmitting system, a receiving system, and a method for processing a broadcast signal are disclosed. The receiving system comprises a tuner, a channel equalizer, a turbo decoder, a demultiplexer, a first error correction decoder, a block deinterleaver, and a second error correction decoder. The tuner receives a broadcast signal including a data group. The data group comprises mobile service data, regularly spaced known data sequences, and signaling data. The turbo decoder performs turbo decoding for the signaling data included in the channel equalized broadcast signal in the channel equalizer. The block deinterleaver performs block deinterleaving for the turbo-decoded FIC data in a block unit of TNoG (the number of all data groups assigned to one subframe)×51 bytes.

公开(公告)号：US20170238317A1

公开(公告)日：2017-08-17

申请号：US15131781

申请日：2016-04-18

Applicant: Yoo Jin CHOI ,  Dongwoon Bai ,  Sungsoo Kim ,  Jungwon Lee

Inventor： Yoo Jin CHOI ,  Dongwoon Bai ,  Sungsoo Kim ,  Jungwon Lee

IPC: H04W72/04 ,  H04L25/02 ,  H04L1/18 ,  H04L27/20 ,  H04J4/00 ,  H04L5/00 ,  H04B1/10

CPC classification number: H04W72/0453 ,  H04B1/10 ,  H04B1/123 ,  H04J4/00 ,  H04L1/005 ,  H04L1/1819 ,  H04L5/005 ,  H04L5/0073 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0256 ,  H04L25/0328 ,  H04L25/03286 ,  H04L25/067 ,  H04L27/2017

Abstract: An apparatus and a method. The apparatus includes a channel estimation (CE) module, including a first input for receiving pilot resource element (RE) observations, a second input for receiving data RE observations, a third input for receiving log-likelihood ratios (LLRs), and an output; a detector, including a first input connected to the output of the CE module, a second input for receiving data RE observations, and an output connected to the third input of the CE module; and a decoder, including an input connected to the third input of the CE module, and an output.

公开(公告)号：US20170230216A1

公开(公告)日：2017-08-10

申请号：US15496230

申请日：2017-04-25

Applicant: Sun Patent Trust

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04L27/26 ,  H04L1/00 ,  H04B7/0456

CPC classification number: H04L27/265 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0473 ,  H04B7/0617 ,  H04B7/0697 ,  H04B7/08 ,  H04B7/086 ,  H04B7/12 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0045 ,  H04L1/0047 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/06 ,  H04L1/0643 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0226 ,  H04L25/0248 ,  H04L25/03942 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/3405 ,  H04L2001/0093

Abstract: Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

公开(公告)号：US20170222752A1

公开(公告)日：2017-08-03

申请号：US15230550

申请日：2016-08-08

Applicant: FUJI XEROX CO., LTD.

Inventor： Tsutomu HAMADA

IPC: H04L1/00 ,  H03M13/15

CPC classification number: H04L1/0041 ,  H03M13/1575 ,  H03M13/6356 ,  H04L1/0045 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0058 ,  H04L25/4908

Abstract: A decoding device receives transmission data obtained by scrambling according to a polynomial xa+xb+1 where a and b are each an integer, a>b, and a≠2b. The decoding device includes a receiving unit, an error detecting unit, and a correcting unit. The receiving unit receives data obtained by scrambling transmission data in a block of 2N or less bits and an (N+3)-bit error correcting code. The (N+3)-bit error correcting code is calculated according to an (N+3)-degree cyclic code generator polynomial that is preset to generate 2N or more types of consecutive syndromes indicating bit error locations. The error detecting unit calculates, from (2(N+3)−1) types of syndromes and on the basis of a table, a bit error location in descrambled data obtained by descrambling the received data. The correcting unit corrects the descrambled data at the error location calculated by the error detecting unit.

公开(公告)号：US20170195144A1

公开(公告)日：2017-07-06

申请号：US15463615

申请日：2017-03-20

Applicant: Hitachi Kokusai Electric Inc.

Inventor： Kei ITO

IPC: H04L25/03 ,  H04L1/00

CPC classification number: H04L25/03019 ,  H03M13/39 ,  H03M13/3905 ,  H03M13/4146 ,  H04L1/005 ,  H04L1/0071 ,  H04L5/0007 ,  H04L25/0232 ,  H04L25/03171 ,  H04L2025/03414

Abstract: When a channel between a transmission apparatus and a reception apparatus is distorted by multipath fading or other reasons, linear interpolation between pilot subcarriers produces a large estimation error, resulting in an increase in an equalization error and a decrease in reception performance. The present invention allows feedback of a signal that undergoes error correction, reduction in the channel estimation error through repeated channel estimation, and improvement in the reception performance.

公开(公告)号：US09698880B2

公开(公告)日：2017-07-04

申请号：US15298799

申请日：2016-10-20

Applicant: Sun Patent Trust

Inventor： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

IPC: H04B7/02 ,  H04B7/0456 ,  H04B1/713 ,  H04B7/04

CPC classification number: H04B7/0465 ,  H04B1/713 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0615 ,  H04L1/0009 ,  H04L1/005 ,  H04L1/0643 ,  H04L1/20

Abstract: Disclosed is a precoding method comprising the steps of: generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2)T=F[i] (s1, s2)T; and changing both of or one of a power of the first precoded signal z1 and a power of the second precoded signal z2, such that an average power of the first precoded signal z1 is less than an average power of the second precoded signal z2.

公开(公告)号：US09686044B2

公开(公告)日：2017-06-20

申请号：US12137431

申请日：2008-06-11

Applicant: Durga Prasad Malladi

Inventor： Durga Prasad Malladi

IPC: H04L27/00 ,  H04L1/00 ,  H03M13/29 ,  H03M13/00

CPC classification number: H04L1/0071 ,  H03M13/2957 ,  H03M13/635 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/0066 ,  H04L1/0067

Abstract: Bits included in each code block of a transport block can be stored to an associated circular buffer and transmitted over a channel. Each circular buffer can vary in size in proportion to a size of the associated code block. Therefore, since in certain operating environments code blocks for a transport block can vary in size, circular buffers can vary in size as well. Accordingly, when not all data from a transport block and/or an array of circular buffers can be transmitted over the channel, each circular buffer from the array can transmit a portion of bits that is proportional to a size of the respective circular buffer (or the associated code block or encoded code block). Furthermore, the number of bits transmitted from each circular buffer can be constrained by an aggregate budget for all circular buffers and can be further constrained to be an integer multiple of a modulation order for the transport block.

公开(公告)号：US09647865B1

公开(公告)日：2017-05-09

申请号：US15213569

申请日：2016-07-19

Applicant: Allen LeRoy Limberg

Inventor： Allen LeRoy Limberg

IPC: H04L27/26 ,  H04L27/06 ,  H04L1/02 ,  H04L27/34 ,  H04L5/00 ,  H04L1/00 ,  H04L5/22 ,  H04L1/04

CPC classification number: H04L27/3427 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/02 ,  H04L1/08 ,  H04L5/0007 ,  H04L27/2647 ,  H04L2001/0093

Abstract: Transmitter apparatus to broadcast coded orthogonal frequency-division multiplexed (COFDM) radio-frequency carriers conveying low-density parity-check (LPDC) coding transmits the same coded DTV signals twice some time apart. The coded DTV signals of initial transmissions and of final transmissions are mapped to quadrature amplitude modulation (QAM) of the COFDM carriers according to first and second patterns, respectively. Bits that map to lattice points in the first mapping pattern more likely to experience error are mapped to lattice points in the second mapping pattern less likely to experience error. Bits that map to lattice points in the second mapping pattern more likely to experience error are mapped to lattice points in the first mapping pattern less likely to experience error. Receiver apparatus demaps QAM symbols in the earlier and later transmissions of twice-transmitted COFDM signals and maximal-ratio combines the de-mapping results at bit level, rather than symbol level.