公开(公告)号：US12126411B2

公开(公告)日：2024-10-22

申请号：US18100466

申请日：2023-01-23

Applicant: Texas Instruments Incorporated

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

IPC: H04B7/04 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/046 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/0639

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

公开(公告)号：US20240305339A1

公开(公告)日：2024-09-12

申请号：US18529538

申请日：2023-12-05

Applicant: BDCM A2 LLC

Inventor： Jun Fang

IPC: H04B7/0426 ,  H04B7/0456 ,  H04B7/08

CPC classification number: H04B7/043 ,  H04B7/046 ,  H04B7/0478 ,  H04B7/086

Abstract: Examples disclosed herein relate to a Multiple-Input Multiple-Output (MIMO) radar for virtual beam steering. The MIMO radar has a plurality of transmit antennas and a receive antenna array having a plurality of radiating elements. The MIMO radar also includes a digital signal processor (DSP) configured to synthesize a virtual receive array having N×M receive subarrays from the plurality of transmit antennas and the receive antenna array, where N is the number of transmit antennas and M is the number of receiving elements. Other examples disclosed herein relate to a method of virtual beam steering.

公开(公告)号：US12074744B2

公开(公告)日：2024-08-27

申请号：US18202410

申请日：2023-05-26

Applicant: Sun Patent Trust

Inventor： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

IPC: H04L27/26 ,  H04B7/0426 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/08 ,  H04B7/12 ,  H04L1/00 ,  H04L1/06 ,  H04L5/00 ,  H04L25/02 ,  H04L25/03 ,  H04L27/00 ,  H04L27/34 ,  H04L25/06

CPC classification number: H04L27/2602 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0473 ,  H04B7/0617 ,  H04B7/0697 ,  H04B7/08 ,  H04B7/086 ,  H04B7/12 ,  H04L1/0045 ,  H04L1/0047 ,  H04L1/005 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/06 ,  H04L5/0007 ,  H04L5/0026 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03942 ,  H04L27/0008 ,  H04L27/265 ,  H04L27/3405 ,  H05K999/99 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0057 ,  H04L2001/0093 ,  H04L1/0643 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0222 ,  H04L25/0248 ,  H04L25/067 ,  H04L27/2626 ,  H04L27/26524

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：US20240214040A1

公开(公告)日：2024-06-27

申请号：US18350594

申请日：2023-07-11

Applicant: Gumi Electronics & Information Technology Research Institute

Inventor： Yong An JUNG ,  Sang Bong BYUN ,  Sung Hun LEE ,  Dong Cheul HAN ,  Soo Hyun CHO

IPC: H04B7/0456

CPC classification number: H04B7/046

Abstract: An object of the present disclosure is to provide a method for high-speed signal relaying based on an MIMO based relay communication system and an apparatus thereof, which use a space time block code (STBC) based two-way relay technology in order to improve transmission rate reduction which occurs upon relaying a transmission signal by using a half duplex relay, and removes an inter relay interference which occurs between a plurality of relays used when using the two-way relay technology by using multiple input multiple output (MIMO) signal detection. In order to achieve the object, the method for high-speed signal relaying in the MIMO based relay communication system includes: receiving, by a plurality of relays, data signals transmitted from a sender by a reception unit during respective time slots; and removing, by a removal unit, an inter relay interference (IRI) component generated by using the plurality of relays.

公开(公告)号：US20240106503A1

公开(公告)日：2024-03-28

申请号：US17954198

申请日：2022-09-27

Applicant: QUALCOMM Incorporated

Inventor： Pinar SEN ,  Seyong PARK ,  Abdelrahman Mohamed Ahmed Mohamed IBRAHIM ,  Renqiu WANG ,  Peter GAAL ,  Naga BHUSHAN ,  Krishna Kiran MUKKAVILLI ,  Tingfang JI

IPC: H04B7/0456 ,  H01Q3/26 ,  H04B7/0417

CPC classification number: H04B7/046 ,  H01Q3/267 ,  H04B7/0421

Abstract: Methods and apparatuses for wireless communication for line-of-sight Multiple-Input-Multiple-Output (LOS MIMO) are described. A first pilot signal is transmitted to a second device. The first pilot signal is at least one of a constant phase pilot or a linear phase ramped pilot for estimating a misalignment of a second antenna array of the second device with respect to a first antenna array of the first device.

公开(公告)号：US11843436B2

公开(公告)日：2023-12-12

申请号：US17755704

申请日：2020-11-06

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Juha Pekka Karjalainen ,  Sami-Jukka Hakola ,  Timo Koskela ,  Jorma Johannes Kaikkonen ,  Antti Tölli

IPC: H04B7/06 ,  H04B7/0456

CPC classification number: H04B7/0639 ,  H04B7/046 ,  H04B7/0697

Abstract: A method can include transmitting, by a user equipment to a base station, coherence information indicating, based on precoding to be performed in association with transmission, whether multiple transmission signals to be transmitted via multiple transmission ports will be coherent with each other, receiving, from the base station, a transmission indication message, the transmission indication message assigning uplink transmission resources and coherence information to the multiple transmission ports, and transmitting, to the base station via the assigned uplink transmission resources, the multiple transmission signals via the multiple transmission ports.

公开(公告)号：US20230308145A1

公开(公告)日：2023-09-28

申请号：US18320839

申请日：2023-05-19

Applicant: Apple Inc.

Inventor： Yu Zhang ,  Dawei Zhang ,  Haitong Sun ,  Wei Zeng ,  Yuchul Kim

IPC: H04B7/0456 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/046 ,  H04B7/0626

Abstract: A base station may transmit to a device an indication of codebook subset restriction (CBSR), which includes at least a restriction on a frequency basis. The device may receive the indication of CBSR, and may transmit to the base station channel state information (CSI) according to the received indication of CBSR. The indication of CBSR may also include a restriction on a spatial basis and restrict the device from reporting the CSI based on a subset of the frequency basis in addition to the spatial basis per configuration of the base station. The indication of CBSR may include a separately configured maximum allowed amplitude of a weighting coefficient for the spatial basis and the frequency basis, where the weighting coefficient is associated with a column vector of a precoding matrix used by the base station and the device. The number of frequency bases and the frequency compression units may be determined based on a number of different criteria, for example the number of antennas, the number of subbands, etc.

公开(公告)号：US11729033B2

公开(公告)日：2023-08-15

申请号：US17897794

申请日：2022-08-29

Applicant: Sun Patent Trust

Inventor： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

IPC: H04L27/26 ,  H04L1/00 ,  H04L5/00 ,  H04L25/03 ,  H04L25/49 ,  H04L27/20 ,  H04L27/22 ,  H04B7/0417 ,  H04B7/0456

CPC classification number: H04L27/2602 ,  H04B7/046 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0478 ,  H04L1/007 ,  H04L1/0042 ,  H04L5/0053 ,  H04L25/0391 ,  H04L25/03942 ,  H04L25/4906 ,  H04L27/2032 ,  H04L27/22 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0048 ,  H04L27/2601

Abstract: Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N−1, and N being an integer at least two, generating a first precoded signal z1 and a second precoded signal z2, generating a first encoded block and a second encoded block using a predetermined error correction block encoding method, generating a baseband signal with M symbols from the first encoded block and a baseband signal with M symbols the second encoded block, and precoding a combination of the generated baseband signals to generate a precoded signal having M slots.

公开(公告)号：US11706069B2

公开(公告)日：2023-07-18

申请号：US17744048

申请日：2022-05-13

Applicant: Sun Patent Trust

Inventor： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

IPC: H04L27/26 ,  H04B7/0426 ,  H04B7/06 ,  H04L1/06 ,  H04L25/02 ,  H04L25/03 ,  H04B7/0452 ,  H04B7/08 ,  H04L1/00 ,  H04L27/34 ,  H04B7/0456 ,  H04B7/12 ,  H04L27/00 ,  H04L5/00 ,  H04L25/06

CPC classification number: H04L27/2602 ,  H04B7/046 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0473 ,  H04B7/0617 ,  H04B7/0697 ,  H04B7/08 ,  H04B7/086 ,  H04B7/12 ,  H04L1/005 ,  H04L1/0045 ,  H04L1/0047 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/06 ,  H04L5/0007 ,  H04L5/0026 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03942 ,  H04L27/0008 ,  H04L27/265 ,  H04L27/3405 ,  H05K999/99 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0643 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0222 ,  H04L25/0248 ,  H04L25/067 ,  H04L27/2626 ,  H04L27/26524 ,  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：US20190173536A1

公开(公告)日：2019-06-06

申请号：US16267884

申请日：2019-02-05

Applicant: Sun Patent Trust

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04B7/0456 ,  H04L1/00 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/046 ,  H04B7/0615 ,  H04B7/0682 ,  H04L1/005

Abstract: A transmission device comprising: a weighting circuity which, in operation, generates transmission signals of n streams (n is an integer of 3 or more) by weighting modulated signals of the n streams using a predetermined fixed precoding matrix; a phase changing circuity which, in operation, regularly changes each phase of a symbol series included in each of the transmission signals of the n streams; and a transmitter which, in operation, transmits the transmission signals of the n streams from different antennas, the phases of each of the transmission signals of the n streams being changed in each symbol, wherein the transmission signal of an i-th stream has an mi kind of phase change value y1(t) (i is an integer between 1 and n (inclusive), 0≤yi