公开(公告)号：US11777650B2

公开(公告)日：2023-10-03

申请号：US16985883

申请日：2020-08-05

Applicant: QUALCOMM Incorporated

Inventor： Ayan Sengupta ,  Alberto Rico Alvarino ,  Qiang Shen ,  Chu-Hsiang Huang ,  Cunzhen Liu ,  Yang Sun ,  Arash Mirbagheri ,  Gabi Sarkis ,  Peter Gaal

IPC: H04L1/00 ,  H04L1/06 ,  H03M13/27 ,  H03M13/15 ,  H04L27/26 ,  H04L5/00 ,  H03M13/29

CPC classification number: H04L1/0071 ,  H04L1/0003 ,  H04L1/0057 ,  H04L1/0606 ,  H04L1/0643 ,  H03M13/15 ,  H03M13/27 ,  H03M13/271 ,  H03M13/2703 ,  H03M13/2778 ,  H03M13/2789 ,  H03M13/2906 ,  H04L1/0059 ,  H04L1/065 ,  H04L5/0023 ,  H04L27/2607

Abstract: A base station maps code blocks of a transport block of a transport block size (TBS) for a channel using tone-level interleaving or resource element (RE)-level interleaving. Then, the base station can transmit the code blocks of the transport block of the TBS for the channel. A UE may receive the channel from the base station and de-interleave the received tones of the channel in a frequency domain to obtain the code blocks of the transport block having the TBS for the channel.

公开(公告)号：US20230179332A1

公开(公告)日：2023-06-08

申请号：US18072672

申请日：2022-11-30

Applicant: MediaTek Singapore Pte. Ltd.

Inventor： Shengquan Hu ,  Jianhan Liu ,  Thomas Edward Pare, JR.

IPC: H04L1/00 ,  H04L1/06

CPC classification number: H04L1/0084 ,  H04L1/0606

Abstract: Techniques pertaining to detailed signaling designs for distributed-tone resource unit (dRU) transmission in wireless communications are described. An apparatus generates a frame with indications of a resource unit (RU) type and a dRU distribution bandwidth . The apparatus then transmits the frame to another apparatus. The RU type is indicated in a Common Information field or a Special User Information field of the frame. The dRU distribution bandwidth is indicated in a Spatial Stream (SS) Allocation subfield of a User Information field of the frame.

公开(公告)号：US20180302250A1

公开(公告)日：2018-10-18

申请号：US16008882

申请日：2018-06-14

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Naveed Iqbal ,  Azzedine Zeguine

IPC: H04L25/03 ,  H04L1/06 ,  H04B7/26

CPC classification number: H04L25/03159 ,  H04B7/2621 ,  H04L1/0606 ,  H04L1/0631 ,  H04L25/03057

Abstract: A device includes circuitry configured to determine feedforward and feedback coefficients for an adaptive frequency-domain decision feedback equalizer (AFD-DFE) based on previously received signals. The equalizer output is determined by applying the feedforward and feedback coefficients of the AFD-DFE to a received signal, and the feedforward and feedback coefficients of the AFD-DFE are updated based on the equalizer output.

公开(公告)号：US20180262381A1

公开(公告)日：2018-09-13

申请号：US15975720

申请日：2018-05-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Tao WU

IPC: H04L27/34 ,  H04L27/26 ,  H04B7/0456 ,  H04B7/12

CPC classification number: H04L27/34 ,  H04B7/0456 ,  H04B7/08 ,  H04B7/12 ,  H04L1/0606 ,  H04L25/03898 ,  H04L27/2602 ,  H04L27/3488

Abstract: Embodiments of the present invention provide a data transmission method and apparatus, and the method includes: modulating to-be-sent information bits according to a lower order constellation diagram, and generating 4m lower order modulation symbols; multiplying a precoding matrix Q by a column vector including every four lower order modulation symbols in the 4m lower order modulation symbols, to obtain 4m to-be-sent higher order modulation symbols corresponding to a higher order constellation diagram; and respectively and correspondingly sending the 4m to-be-sent higher order modulation symbols on different carriers of two antennas. The to-be-sent higher order modulation symbols include some or all to-be-sent information bits. Therefore, the same signal can be simultaneously sent on different carriers of multiple antennas, and frequency diversity and space diversity are implemented, so that transceiving performance of data transmission is improved.

公开(公告)号：US20180205500A1

公开(公告)日：2018-07-19

申请号：US15856991

申请日：2017-12-28

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： Jaeyoung Kwak ,  Robert L. Olesen ,  Aykut Bultan ,  Eldad M. Zeira ,  Chang-Soo Koo ,  Fatih M. Ozluturk ,  Yuejin Huang ,  Kalpendu R. Pasad

IPC: H04L1/06 ,  H04B7/0417 ,  H04B7/06 ,  H04L1/00 ,  H04L5/00

CPC classification number: H04L1/0009 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/066 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/0606 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/006 ,  H04L27/156 ,  H04L27/2626 ,  H04L2027/0046 ,  Y02B70/30 ,  Y02D50/10

Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.

公开(公告)号：US09991992B2

公开(公告)日：2018-06-05

申请号：US15434283

申请日：2017-02-16

Applicant: InterDigital Technology Corporation

Inventor： Robert L. Olesen ,  Eldad M. Zeira ,  Peter J. Voltz ,  Yongwen E. Yang ,  Qingyuan Dai ,  Chang-Soo Koo ,  I-Tai Lu ,  KunJu Tsai

IPC: H04W4/00 ,  H04L1/06 ,  H04B7/06 ,  H04B7/0456 ,  H04B17/336 ,  H04L1/00 ,  H04W84/12

CPC classification number: H04L1/0643 ,  H04B7/0456 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0837 ,  H04B7/0891 ,  H04B17/336 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0631 ,  H04L27/2626 ,  H04L27/2647 ,  H04W84/12

Abstract: A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.

公开(公告)号：US09979584B2

公开(公告)日：2018-05-22

申请号：US15327643

申请日：2014-08-25

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Jianfeng Wang

IPC: H04L27/04 ,  H04L27/34 ,  H04L27/10 ,  H04L1/06 ,  H04L27/26

CPC classification number: H04L27/34 ,  H04B7/0669 ,  H04B7/068 ,  H04L1/0606 ,  H04L1/0625 ,  H04L5/0023 ,  H04L27/106 ,  H04L27/2614 ,  H04L27/2617 ,  H04L27/32

Abstract: The present disclosure provides a transmission method comprising splitting a block of bits to be transmitted into a number of groups each consisting of k+2q bits, wherein k and q are natural numbers and each of the groups includes a subgroup consisting of k bits and two subgroups each consisting of q bits and performing 2q-ary QAM modulation on the subgroups of q bits from the groups of k+2q bits to obtain QAM symbols, respectively. The QAM symbols are processed so that two QAM symbols obtained from the two subgroups of q bits in each of the groups of k+2q bits are mapped onto at least two antennas as consecutive processed symbols. Through the use of 2k-ary FSK modulation, a frequency tone to which the two consecutive processed symbols are allocated is selected according to the subgroup of k bits from each of the groups of k+2q bits before transmission.

公开(公告)号：US20180139010A1

公开(公告)日：2018-05-17

申请号：US15577612

申请日：2016-06-15

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Nicolas GRESSET

IPC: H04L1/00 ,  H04L1/06 ,  H04L27/34

CPC classification number: H04L1/0054 ,  H04L1/005 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/0606 ,  H04L1/0618 ,  H04L1/0631 ,  H04L1/0643 ,  H04L1/0668 ,  H04L25/067 ,  H04L27/34

Abstract: Method for computing likelihoods in a process for reconstructing decoded information words from vectors of observations received from a wireless channel and generated from vectors of transmission symbols using a plurality of Alamouti matrix based Differential Space Time Block Codes coder. The method comprises applying an iterative reconstruction process, comprising, in a current iteration: receiving a vector of observations; determining, at least one vector of approximated scaling factors to be applied to the vector of observations; determining for each vector of approximated scaling factors a vector of approximated scaled equivalent channel models; and, computing likelihoods in the form of values representative of joint probabilities of obtaining the vector of observations knowing a vector of modulated symbols and a model of the wireless channel using each determined vector of approximated scaling factors and each determined vector of approximated scaled equivalent channel models.

公开(公告)号：US20180123844A1

公开(公告)日：2018-05-03

申请号：US15859192

申请日：2017-12-29

Applicant: Newracom, Inc.

Inventor： Yujin NOH ,  Dae Won LEE ,  Sungho MOON ,  Jae Hyun AHN ,  Hee Jung YU ,  Minho CHEONG

IPC: H04L27/26 ,  H04B7/12

CPC classification number: H04L27/2602 ,  H04B7/068 ,  H04B7/12 ,  H04L1/06 ,  H04L1/0606 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/2626 ,  H04L27/2647

Abstract: Transmitting a frame may include determining a numerology according to a channel bandwidth, indicating the numerology in a field of a frame, and transmitting the frame using the numerology. Receiving a frame may include receiving a preamble of a frame, determining a numerology using the preamble, and receiving later portions of the frame using the numerology. Transmitting a frame may include, for a transmission time slot, determining a value of a first subcarrier of a first Space-Time Stream (STS), determining a value of a second subcarrier of the first STS, and determining, according to complex conjugates or negative complex conjugates of the values of the first and second subcarriers of the first STS, respective values of second and first sub carriers of a second STS. Transmitting a constellation point of a frame may be performed using an orphan subcarrier pair.

公开(公告)号：US20180069614A1

公开(公告)日：2018-03-08

申请号：US15797138

申请日：2017-10-30

Applicant: APPLE INC

Inventor： Mahmoud Taherzadehboroujeni ,  Hosein Nikopour ,  Amir Khandani ,  Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Dong-Sheng Yu ,  Jianglei Ma

IPC: H04B7/06

CPC classification number: H04B7/0669 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/0697 ,  H04B7/0891 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0643 ,  H04L1/0668 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L27/2626

Abstract: Methods and devices are provided for MIMO OFDM transmitter and receivers having odd and/even numbers of transmit antennas. Various methods for pre-coding information bits before space time coding (STC) are described for enabling transmission of information bits over all antennas. Methods of decoding received signals that have been pre-coded and STC coded are also provided by embodiments of the invention. Pilot patterns for downlink and uplink transmission between a base station and one or more wireless terminals for three transmit antenna transmitters are also provided. Variable rate codes are provided that combine various fixed rate codes in a manner that results in codes whose rates are dependent on all the various fixed rate codes that are combined