公开(公告)号：US10944517B2

公开(公告)日：2021-03-09

申请号：US16078480

申请日：2016-11-04

Applicant: Jian Li ,  Changlong Xu ,  Jilei Hou ,  Neng Wang ,  Chao Wei ,  QUALCOMM Incorporated

Inventor： Jian Li ,  Changlong Xu ,  Jilei Hou ,  Neng Wang ,  Chao Wei

IPC: H04L1/18 ,  H03M13/13 ,  H03M13/29 ,  H04L1/00 ,  H04L1/20 ,  H03M13/00 ,  H04W72/04

Abstract: For communication utilizing polar codes, a hybrid automatic repeat request algorithm utilizing incremental redundancy (HARQ-IR) may provide increased throughput by including new data, not based on an original transmission, in a HARQ retransmission. The number of retransmitted bits and new information bits in each HARQ retransmission may be controlled in order to manage a tradeoff between increased throughput and a decreased block error rate (BLER).

公开(公告)号：US10721029B2

公开(公告)日：2020-07-21

申请号：US16091081

申请日：2017-03-03

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Jian Li ,  Chao Wei ,  Neng Wang ,  Jilei Hou

IPC: H04L1/18 ,  H04L1/00 ,  H04L5/00 ,  H03M13/13 ,  H03M13/00

Abstract: The present disclosure describes a method, an apparatus, and a computer readable medium for hybrid automatic repeat request (HARQ) transmissions. For example, the method may include generating a first codeword for a first information block, wherein the first codeword is a first polar code, and wherein the first information block includes cyclic redundancy check (CRC) bits; transmitting the first codeword to a receiver; determining that the first polar code is not successfully decoded at the receiver based at least on a first message received from the receiver; generating a second codeword for a second information block, wherein the second codeword is a first enhanced polar code, and wherein the second information block does not include any CRC bits; transmitting the second codeword to the receiver; and determining that the second codeword and the first codeword are successfully decoded at the receiver based at least on a second message received from the receiver.

公开(公告)号：US20200100214A1

公开(公告)日：2020-03-26

申请号：US16467454

申请日：2018-01-24

Applicant: Chao WEI ,  Jilei HOU ,  Changlong XU ,  Jian LI ,  Qualcomm Incorporated

Inventor： Chao Wei ,  Changlong Xu ,  Jilei Hou ,  Jian Li

IPC: H04W72/00 ,  H04W56/00 ,  H04L1/00 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communication are described. In order to exchange data over a given wireless communication network, a wireless device may first perform a cell acquisition procedure (e.g., to determine cell-specific information such as timing and frequency offsets, bandwidth, control channel formatting, etc.). In some systems, aspects of the timing information may be conveyed with scrambling codes applied to a master information block (MIB). Physical broadcast channel (PBCH) payloads, including MIB transmissions, may be jointly encoded with synchronization signal indices. Bursts of MIB transmissions may thus be decoded without blind decoding while maintaining error protection and low latency that may be necessary to obtain critical system information within the MIB.

公开(公告)号：US20190372712A1

公开(公告)日：2019-12-05

申请号：US16476890

申请日：2018-02-17

Applicant: Qualcomm Incorporated

Inventor： Yang Yang ,  Jing Jiang ,  Changlong Xu ,  Gabi Sarkis ,  Chao Wei ,  Hari Sankar ,  Jian Li ,  Joseph Binamira Soriaga

IPC: H04L1/00

Abstract: Techniques are described for wireless communication. One method includes identifying a set of punctured bit locations in a received codeword. The received codeword is encoded using a polar code. The method also includes identifying a set of information bit locations of the polar code, with the set of information bit locations being determined based at least in part on polarization weights per polarized bit-channel of a polar code decoder that are a function of nulled repetition operations per polarization stage of the polar code identified based at least in part on the set of punctured bit locations. The method further includes processing the received codeword using the polar code decoder to obtain an information bit vector at the set of information bit locations.

公开(公告)号：US20180278272A1

公开(公告)日：2018-09-27

申请号：US15851303

申请日：2017-12-21

Applicant: QUALCOMM Incorporated

Inventor： Jian Li ,  Changlong Xu ,  Chao Wei ,  Jilei Hou ,  Jing Jiang

IPC: H03M13/29 ,  H03M13/00

CPC classification number: H03M13/2906 ,  H03M13/152 ,  H03M13/2963 ,  H03M13/6393 ,  H03M13/6561

Abstract: Methods, systems, and devices for wireless communication are described that support channel selection for parity bits in polar coding techniques. In some cases, an encoder or decoder of a wireless device may assign information bits, frozen bits, and parity check bits to polar channels of an encoder or decoder based on reliability metrics. The information bits may initially be assigned and based on a channel index of the first information bit, the parity check bits may be assigned to channels having higher channel indices than the first information bit. After assignment, the bits may be encoded or decoded.

公开(公告)号：US09544128B2

公开(公告)日：2017-01-10

申请号：US14768302

申请日：2013-02-21

Applicant: QUALCOMM INCORPORATED

Inventor： Hai Jiang ,  Yin Huang ,  Changlong Xu ,  Jian Li ,  Yisheng Xue

IPC: H04L7/00 ,  H04L7/04 ,  H04L7/10

CPC classification number: H04L7/0037 ,  H04L7/0062 ,  H04L7/043 ,  H04L7/10

Abstract: A method of data-aided timing recovery for Ethernet systems is disclosed. A first device negotiates a pseudorandom number sequence with a second device and receives a data signal from the second device. The first device samples the received data signal to recover a first training sequence. The first device also generates a second training sequence based on the pseudorandom number sequence. The second training sequence is then synchronized with the first training sequence. The synchronized second training sequence is used to align a receive clock signal of the first device with the data signal received from the second device.

Abstract translation: 公开了一种用于以太网系统的数据辅助定时恢复的方法。 第一设备与第二设备协商伪随机数序列，并从第二设备接收数据信号。 第一设备对接收的数据信号进行采样以恢复第一训练序列。 第一设备还基于伪随机数序列生成第二训练序列。 然后将第二训练序列与第一训练序列同步。 同步的第二训练序列用于将第一设备的接收时钟信号与从第二设备接收的数据信号对准。

公开(公告)号：US20150372803A1

公开(公告)日：2015-12-24

申请号：US14768302

申请日：2013-02-21

Applicant: Hai JIANG ,  Yin HUANG ,  Changlong XU ,  Jian LI ,  Yisheng XUE ,  QUALCOMM INCORPORATED

Inventor： Hai Jiang ,  Yin Huang ,  Changlong Xu ,  Jian Li ,  Yisheng Xue

IPC: H04L7/00 ,  H04L7/04

CPC classification number: H04L7/0037 ,  H04L7/0062 ,  H04L7/043 ,  H04L7/10

Abstract: A method of data-aided timing recovery for Ethernet systems is disclosed. A first device negotiates a pseudorandom number sequence with a second device and receives a data signal from the second device. The first device samples the received data signal to recover a first training sequence. The first device also generates a second training sequence based on the pseudorandom number sequence. The second training sequence is then synchronized with the first training sequence. The synchronized second training sequence is used to align a receive clock signal of the first device with the data signal received from the second device.

Abstract translation: 公开了一种用于以太网系统的数据辅助定时恢复的方法。 第一设备与第二设备协商伪随机数序列，并从第二设备接收数据信号。 第一设备对接收的数据信号进行采样以恢复第一训练序列。 第一设备还基于伪随机数序列生成第二训练序列。 然后将第二训练序列与第一训练序列同步。 同步的第二训练序列用于将第一设备的接收时钟信号与从第二设备接收的数据信号对准。

公开(公告)号：US20250150320A1

公开(公告)日：2025-05-08

申请号：US18833331

申请日：2022-03-15

Applicant: QUALCOMM INCORPORATED

Inventor： Wei Liu ,  Thomas Joseph Richardson ,  Liangming Wu ,  Changlong Xu ,  Hao Xu

IPC: H04L27/34 ,  H04L1/00 ,  H04L27/26 ,  H04L27/36

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may perform, on a set of information bits, a distribution matching procedure to obtain a distributed amplitude symbol sequence. In some cases, the wireless device may perform the distribution matching procedure using approximations of quantities of distributed amplitude symbol sequences that each have a same length and a same transmission energy. The wireless device may then encode the distributed amplitude symbol sequence and transmit the encoded distributed amplitude sequence. A device that receives the encoded distributed amplitude sequence may perform a distribution dematching procedure on the distributed amplitude sequence based on approximating quantities of distributed amplitude symbol sequences.

公开(公告)号：US20250150213A1

公开(公告)日：2025-05-08

申请号：US18835282

申请日：2022-03-17

Applicant: QUALCOMM INCORPORATED

Inventor： Shaozhen Guo ,  Changlong Xu ,  Jing Sun ,  Xiaoxia Zhang ,  Chih-Hao Liu ,  Hao Xu ,  Luanxia Yang ,  Siyi Chen

IPC: H04L1/1829 ,  H04W72/23

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive configuration information indicating a sidelink resource pool, a time gap, and a periodicity of feedback occasions. The UE may generate feedback bits associated with multiple received sidelink messages based on the configuration information. The UE may transmit the feedback bits in a single, multi-bit feedback message according to one or more rules. In some examples, the UE may drop one or more sets of feedback bits (e.g., in the case of a collision of too many feedback messages in a single slot) based on a weighted average priority level of one or more valid feedback bits in each of multiple sets of feedback bits.

公开(公告)号：US12177827B2

公开(公告)日：2024-12-24

申请号：US17427854

申请日：2019-02-08

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Changlong Xu ,  Hao Xu

IPC: H04W72/121 ,  H04W72/23

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may obtain group control information in a group common physical downlink shared channel (PDSCH), determine resources for communicating on a shared channel based on the group control information, and communicate on the resources of the shared channel. A base station may configure a user equipment (UE) group comprising at least one UE, transmit, in a group common physical downlink shared channel (PDSCH), group control information for scheduling the at least one UE for communicating on a shared channel, and communicate on the shared channel with the at least one UE.