公开(公告)号：US20240305359A1

公开(公告)日：2024-09-12

申请号：US18646071

申请日：2024-04-25

Applicant: Sun Patent Trust

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04B7/155 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04L25/03 ,  H04L27/26 ,  H04L27/34 ,  H04W4/06 ,  H04W40/22

CPC classification number: H04B7/15542 ,  H04B7/0456 ,  H04B7/0604 ,  H04L5/0053 ,  H04L25/03171 ,  H04L25/0391 ,  H04L25/03949 ,  H04L27/2614 ,  H04L27/34 ,  H04W4/06 ,  H04W40/22 ,  H04B7/0413 ,  H04L5/0023

Abstract: Disclosed is a relay method including: receiving, as input, respective reception signals by two receive antennas, the reception signals each including a reception signal resulting from multiplexing respective transmission signals transmitted by two transmission antennas in a first frequency band; performing frequency conversion on the reception signal received by one of the receive antennas so as to obtain a signal of a third frequency band; and performing frequency multiplexing on the signal having the third frequency band and the reception signal received by the other of the receive antennas.

公开(公告)号：US20240297810A1

公开(公告)日：2024-09-05

申请号：US18655135

申请日：2024-05-03

Applicant: NVIDIA Corporation

Inventor： Jeremy David Furtek

IPC: H04L25/03

CPC classification number: H04L25/03171 ,  H04L25/03859 ,  H04L25/03872 ,  H04L2025/0342

Abstract: Apparatuses, systems, and techniques to demodulate data for fifth-generation (5G) new radio (NR). In at least one embodiment, a processor includes one or more circuits to use a parallel processor to determine a signal value based, at least in part, on one or more predetermined probability values.

公开(公告)号：US20240297809A1

公开(公告)日：2024-09-05

申请号：US18655128

申请日：2024-05-03

Applicant: NVIDIA Corporation

Inventor： Jeremy David Furtek

IPC: H04L25/03

CPC classification number: H04L25/03171 ,  H04L25/03859 ,  H04L25/03872 ,  H04L2025/0342

Abstract: Apparatuses, systems, and techniques to demodulate data for fifth-generation (5G) new radio (NR). In at least one embodiment, a processor includes one or more circuits to use a parallel processor to determine a signal value based, at least in part, on one or more predetermined probability values.

公开(公告)号：US20240195660A1

公开(公告)日：2024-06-13

申请号：US18551548

申请日：2022-03-31

Applicant: Cohere Technologies, Inc.

Inventor： Shachar KONS

IPC: H04L25/02 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04L25/0224 ,  H04L25/03171 ,  H04L27/2639 ,  H04L27/26532

Abstract: Methods, systems and devices for wireless communication are described. One method includes obtaining a two-dimensional delay-Doppler representation of a received wireless signal that is received over a wireless channel, determining an estimated channel response of the wireless channel from a portion of the delay-Doppler grid corresponding to a channel estimation portion, performing, using the estimated channel response, channel equalization in the delay-Doppler domain, generating, based on the channel equalization, a posteriori probability estimates of data symbols in the received wireless signal, wherein the a posteriori probability estimates are generated based on a priori feedback that is generated using an iterative process and further processing the a posteriori probability estimates of data symbols to recover information bits from the received wireless signal.

公开(公告)号：US20180309503A1

公开(公告)日：2018-10-25

申请号：US16017244

申请日：2018-06-25

Applicant: Sun Patent Trust

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04B7/155 ,  H04W40/22 ,  H04W4/06 ,  H04L27/34 ,  H04L27/26 ,  H04L25/03 ,  H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04B7/0413

CPC classification number: H04B7/15542 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0604 ,  H04L5/0023 ,  H04L25/03171 ,  H04L25/0391 ,  H04L25/03949 ,  H04L27/2614 ,  H04L27/34 ,  H04W4/06 ,  H04W40/22

Abstract: Disclosed is a relay method including: receiving, as input, respective reception signals by two receive antennas, the reception signals each including a reception signal resulting from multiplexing respective transmission signals transmitted by two transmission antennas in a first frequency band; performing frequency conversion on the reception signal received by one of the receive antennas so as to obtain a signal of a third frequency band; and performing frequency multiplexing on the signal having the third frequency band and the reception signal received by the other of the receive antennas.

公开(公告)号：US20170331644A1

公开(公告)日：2017-11-16

申请号：US15667451

申请日：2017-08-02

Applicant: TrellisWare Technologies, Inc.

Inventor： Marcus T. Urie ,  Ryan P. McCourt ,  Cenk Köse ,  Keith M. Chugg

IPC: H04L25/02 ,  H04L25/03 ,  H04B10/2575

CPC classification number: H04L25/0204 ,  H04B1/38 ,  H04B10/112 ,  H04B10/25 ,  H04B10/2575 ,  H04L25/03057 ,  H04L25/03165 ,  H04L25/03171

Abstract: A method and system for maximizing throughput and minimizing latency in a communication system that supports heterogeneous links is presented. The communication system supports a primary link and an alternate link, and the method and system leverage the alternate link to reduce the overhead transmitted over the primary link, thereby increasing throughput and reducing end-to-end latency. The higher latency alternate link provides a delayed version of an information signal that corresponds to a portion of the information signal that is transmitted on the primary link. The received samples from the primary and alternate links may be used to equalize subsequent portions of the information signal received over the primary link, and may also be used for synchronization, timing recovery, DC offset removal, I/Q imbalance compensation, and frequency-offset estimation.

公开(公告)号：US09793968B2

公开(公告)日：2017-10-17

申请号：US15389494

申请日：2016-12-23

Applicant: Sun Patent Trust

Inventor： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/0413 ,  H04L25/03

CPC classification number: H04B7/0456 ,  H04B7/0413 ,  H04B7/0469 ,  H04B7/0617 ,  H04L25/03171 ,  H04L25/03942 ,  H04L25/03949 ,  H04L27/18 ,  H04L27/2626 ,  H04L27/34

Abstract: Disclosed is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals that are transmitted in the same frequency bandwidth at the same time. According to the precoding method, one matrix is selected from among matrices defining a precoding process that is performed on the plurality of baseband signals by hopping between the matrices. A first baseband signal and a second baseband signal relating to a first coded block and a second coded block generated by using a predetermined error correction block coding scheme satisfy a given condition.

公开(公告)号：US20170272283A1

公开(公告)日：2017-09-21

申请号：US15071491

申请日：2016-03-16

Applicant: Northrop Grumman Systems Corporation

Inventor： Robert S. Kingery ,  Daniel N. Liu

IPC: H04L25/03 ,  H03M13/39 ,  H03M13/41 ,  H03M13/27

CPC classification number: H04L25/03229 ,  H03M13/2771 ,  H03M13/2792 ,  H03M13/3905 ,  H03M13/3944 ,  H03M13/3955 ,  H03M13/3972 ,  H03M13/41 ,  H03M13/6331 ,  H04L25/03019 ,  H04L25/03171 ,  H04L25/03305 ,  H04L25/03318

Abstract: An apparatus and method for optimizing the performance of satellite communication system receivers by using the Soft-Input Soft-Output (SISO) BCJR (Bahl, Cocke, Jelinek and Raviv) algorithm to detect a transmitted information sequence is disclosed. A Sliding Window technique is used with a plurality of reduced state sequence estimation (RSSE) equalizers to execute the BCJR algorithm in parallel. A serial data stream is converted into a plurality of data blocks using a serial-to-parallel converter. After processing in parallel by the equalizers, the output blocks are converted back to a serial data stream by a parallel-to-serial converter. A path history is determined using maximum likelihood (ML) path history calculation.

公开(公告)号：US09755769B2

公开(公告)日：2017-09-05

申请号：US15319879

申请日：2015-06-17

Applicant: AIRBUS DS SAS

Inventor： Philippe Mege

IPC: H04K1/10 ,  H04B17/309 ,  H04L25/03 ,  H04L25/02

CPC classification number: H04B17/309 ,  H04L25/021 ,  H04L25/0222 ,  H04L25/03171

Abstract: A method estimates a channel for radioelectric propagation between a transmitter and a receiver. The transmitter transmits a signal including frames that each use N1 frequency subcarriers, over each of which N1 symbols are transmitted, wherein, among the set of symbols, certain symbols, referred to as pilot symbols, are known to the receiver. The method implemented in the receiver includes; determining an overall intermediate covariance matrix M2 of the channel that embodies a time profile of the channel, which profile is symmetrical and centered on the time synchronization position, and a frequency profile of the channel, which profile is symmetrical and centered on the frequency synchronization position; calculating a vector for an intermediate channel C on the basis of the predetermined overall intermediate covariance matrix M2; and estimating the channel on the basis of the calculated vector for the intermediate channel C′.

公开(公告)号：US09647733B2

公开(公告)日：2017-05-09

申请号：US14885787

申请日：2015-10-16

Applicant: QUALCOMM Incorporated

Inventor： Fuyun Ling ,  J. Rodney Walton ,  Mark Wallace ,  Ivan Fernandez ,  Naga Bhushan

IPC: H04B7/02 ,  H04B7/0417 ,  H04B7/06 ,  H04L1/00 ,  H04L27/34 ,  H04L25/03 ,  H04L5/00

CPC classification number: H04B7/0417 ,  H04B7/0632 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/0055 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/006 ,  H04L25/03171 ,  H04L27/3488

Abstract: Coding techniques for a (e.g., OFDM) communication system capable of transmitting data on a number of “transmission channels” at different information bit rates based on the channels' achieved SNR. A base code is used in combination with common or variable puncturing to achieve different coding rates required by the transmission channels. The data (i.e., information bits) for a data transmission is encoded with the base code, and the coded bits for each channel (or group of channels with the similar transmission capabilities) are punctured to achieve the required coding rate. The coded bits may be interleaved (e.g., to combat fading and remove correlation between coded bits in each modulation symbol) prior to puncturing. The unpunctured coded bits are grouped into non-binary symbols and mapped to modulation symbols (e.g., using Gray mapping). The modulation symbol may be “pre-conditioned” and prior to transmission.