公开(公告)号：US10666464B2

公开(公告)日：2020-05-26

申请号：US15955477

申请日：2018-04-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Samer Bazzi ,  Wen Xu

IPC: H04L25/02 ,  H04L5/00 ,  H04J11/00 ,  H04L27/26 ,  H04B7/06 ,  H04J13/00

Abstract: Allocation of CSI-RS or CSI pilot sequences among cells in a cooperative manner to reduce pilot inter-cell interference. Sequences in each cell occupy the same time slot, multiple subcarrier frequencies, and are orthogonal in time via properly chosen cyclic shifts. Sequences in multiple cells are chosen from a pool of non-orthogonal yet distinguishable sequences through their root indices. Exchanging root indices among cells allows a given cell to reconstruct sequences used in neighboring cells and to estimate interfering channels as the number of channel taps is usually limited, thus mitigating pilot contamination. Furthermore, a greedy selection algorithm to find combinations of sequences that further reduce the channel estimation mean-square-error is proposed.

公开(公告)号：US11894923B2

公开(公告)日：2024-02-06

申请号：US17390027

申请日：2021-07-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Onurcan Iscan ,  Wen Xu

IPC: H04L1/00

CPC classification number: H04L1/0005 ,  H04L1/0042

Abstract: Example transmission methods and apparatus are described. In one example method, a transmitter is configured to communicate with a receiver via a communication channel. The transmitter is configured to precode a data word into a precoded data word using a probabilistic shaping scheme, wherein the probabilistic shaping scheme depends on one or more precoding parameters. The precoded data word is encoded into a codeword using a modulation and/or coding scheme, wherein the modulation and/or coding scheme depends on one or more modulation and coding parameters. At least one precoding parameter is determined on the basis of at least one of the one or more modulation and coding parameters and/or on the basis of at least one further precoding parameter.

公开(公告)号：US12113652B2

公开(公告)日：2024-10-08

申请号：US17728659

申请日：2022-04-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Onurcan Iscan ,  Ronald Boehnke ,  Wen Xu

IPC: H04L25/49 ,  H04L25/02 ,  H04L25/03

CPC classification number: H04L25/4917 ,  H04L25/0224 ,  H04L25/03929

Abstract: The present disclosure provides an apparatus and method for multi-level encoding of an input message sequence into a symbol sequence, for instance, based on polar coding. The input message comprises information bits. The apparatus is configured to divide the input message into a plurality of sub-messages, encode each of the sub-messages into a codeword, wherein a set of the sub-messages is encoded on the basis of the codewords obtained by encoding the sub-messages not in the set and a predefined function of the symbol sequence, and map the encoded sub-messages into corresponding symbols.

公开(公告)号：US20240244482A1

公开(公告)日：2024-07-18

申请号：US18622786

申请日：2024-03-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Martin Schubert ,  Ramya Panthangi Manjunath ,  Chan Zhou ,  Wen Xu

IPC: H04W28/02 ,  H04B17/336 ,  H04W28/06 ,  H04W92/18

CPC classification number: H04W28/0289 ,  H04B17/336 ,  H04W28/06 ,  H04W92/18

Abstract: Methods and related devices for performing congestion control in a decentralized way are provided, particularly for controlling interference among autonomous wireless communication links, such as sidelink communication. According to embodiments of the present disclosure, methods for performing congestion control comprise sending a cooperation message that includes a measured total interference and a cooperation mode indicator. Based on this cooperation message, other devices may voluntarily decide to join a coalition for perform congestion control.

公开(公告)号：US11309917B2

公开(公告)日：2022-04-19

申请号：US16901934

申请日：2020-06-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Balazs Matuz ,  Gianluigi Liva ,  Onurcan Iscan ,  Ronald Boehnke ,  Wen Xu

IPC: G06F11/00 ,  H03M13/11 ,  H03M13/00

Abstract: Protograph-based LDPC codes are obtained from z-row-orthogonal base matrices with some additional structure constraints, such as a diagonal and/or double-diagonal structure, in order to allow a high parallelization that is a multiple of z, while having an efficient encoding or decoding. A “big” base matrix is constructed from a structured square submatrix in order to have a WiMAX-like structure and a z-row-orthogonality. Also, starting from a “smaller” base matrix having a part arranged in a double-diagonal shape with tail-biting one, an expansion by a factor equal to z can be performed, followed by an addition of a single one-entry into the last column at a specific location, thereby obtaining a three-degree column, and followed by a row and/or column permutation in order to obtain a base matrix in a WiMAX-like structure.