公开(公告)号：US20230327683A1

公开(公告)日：2023-10-12

申请号：US18327765

申请日：2023-06-01

Applicant: QUALCOMM Incorporated

Inventor： Shrinivas KUDEKAR ,  Thomas Joseph RICHARDSON

IPC: H03M13/03 ,  H04L1/1812 ,  H03M13/11 ,  H03M13/00 ,  H04L1/00

CPC classification number: H03M13/1148 ,  H03M13/036 ,  H03M13/116 ,  H03M13/616 ,  H03M13/6306 ,  H03M13/6393 ,  H03M13/6505 ,  H03M13/6516 ,  H04L1/0041 ,  H04L1/0056 ,  H04L1/0058 ,  H04L1/0067 ,  H04L1/1812 ,  H04L1/1819

Abstract: Certain aspects of the present disclosure generally relate to techniques for compactly describing lifted low-density parity-check (LDPC) codes. A method by a transmitting device generally includes selecting a first lifting size value and a first set of lifting values; generating a first lifted LDPC code by applying the first set of lifting values to interconnect edges in copies of a parity check matrix (PCM) having a first number of variable nodes and a second number of check nodes; determining a second set of lifting values for generating a second lifted LDPC code for a second lifting size value based on the first lifted PCM and the first set of lifting values; encoding a set of information bits based the first lifted LDPC code or the second lifted LDPC code to produce a code word; and transmitting the code word.

公开(公告)号：US20200021309A1

公开(公告)日：2020-01-16

申请号：US16336213

申请日：2017-07-11

Applicant: QUALCOMM Incorporated

Inventor： Changlong XU ,  Shrinivas KUDEKAR ,  Thomas RICHARDSON ,  Joseph Binamira SORIAGA

IPC: H03M13/09 ,  H03M13/11 ,  H03M13/29 ,  H03M13/13

Abstract: Various aspects of the disclosure relate to encoding information and decoding information. In some aspects, the disclosure relates to an encoder and a decoder for Polar codes with HARQ. If a first transmission of the encoder fails, information bits associated with a lower quality channel may be retransmitted. At the decoder, the resulting decoded retransmitted bits may be used to decode the first transmission by substituting the retransmitted bits for the original corresponding (low quality channel) bits. In some aspects, to decode the first transmission, soft-combining is applied to the decoded retransmitted bits and the original corresponding (low quality channel) bits. In some aspects, CRC bits for a first transmission may be split between a first subset of bits and a second subset of bits. In this case, the second subset of bits and the associated CRC bits may be used for a second transmission (e.g., a retransmission).

公开(公告)号：US20190245654A1

公开(公告)日：2019-08-08

申请号：US16387130

申请日：2019-04-17

Applicant: QUALCOMM Incorporated

Inventor： Thomas Joseph RICHARDSON ,  Shrinivas KUDEKAR

IPC: H04L1/00 ,  H04L1/18 ,  H03M13/00 ,  H03M13/11 ,  H03M13/03

CPC classification number: H03M13/1148 ,  H03M13/036 ,  H03M13/116 ,  H03M13/616 ,  H03M13/6306 ,  H03M13/6393 ,  H03M13/6505 ,  H03M13/6516 ,  H04L1/0041 ,  H04L1/0058 ,  H04L1/0067 ,  H04L1/1812 ,  H04L1/1819

Abstract: Certain aspects of the present disclosure generally relate to techniques for puncturing of structured low-density parity-check (LDPC) codes. Certain aspects of the present disclosure generally relate to methods and apparatus for a high-performance, flexible, and compact LDPC code. Certain aspects can enable LDPC code designs to support large ranges of rates, blocklengths, and granularity, while being capable of fine incremental redundancy hybrid automatic repeat request (IR-HARQ) extension while maintaining good floor performance, a high-level of parallelism to deliver high throughout performance, and a low description complexity.

公开(公告)号：US20170359148A1

公开(公告)日：2017-12-14

申请号：US15622008

申请日：2017-06-13

Applicant: QUALCOMM Incorporated

Inventor： Thomas Joseph RICHARDSON ,  Shrinivas KUDEKAR

IPC: H04L1/00 ,  H03M13/11 ,  H04L1/18

CPC classification number: H04L1/0058 ,  H03M13/036 ,  H03M13/1148 ,  H03M13/116 ,  H03M13/616 ,  H03M13/6306 ,  H03M13/6505 ,  H03M13/6516 ,  H04L1/0041 ,  H04L1/0067 ,  H04L1/1812 ,  H04L1/1819

Abstract: Certain aspects of the present disclosure generally relate to techniques for puncturing of structured low-density parity-check (LDPC) codes. Certain aspects of the present disclosure generally relate to methods and apparatus for a high-performance, flexible, and compact LDPC code. Certain aspects can enable LDPC code designs to support large ranges of rates, blocklengths, and granularity, while being capable of fine incremental redundancy hybrid automatic repeat request (IR-HARQ) extension while maintaining good floor performance, a high-level of parallelism to deliver high throughout performance, and a low description complexity.

公开(公告)号：US20170353267A1

公开(公告)日：2017-12-07

申请号：US15395749

申请日：2016-12-30

Applicant: QUALCOMM Incorporated

Inventor： Shrinivas KUDEKAR ,  Thomas Joseph RICHARDSON

IPC: H04L1/00

CPC classification number: H04L1/0041 ,  H03M13/09 ,  H03M13/13 ,  H04L1/0045 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/0061

Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for improving decoding latency and performance of Polar codes. An exemplary method generally includes generating a codeword by encoding information bits using a first code of length K to obtain bits for transmission via K channels, wherein the first code comprises a polar code, further encoding the bits in each of the K channels using a second code of length M, and transmitting the codeword.

公开(公告)号：US20160261987A1

公开(公告)日：2016-09-08

申请号：US14966293

申请日：2015-12-11

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar JOVICIC ,  Shrinivas KUDEKAR

IPC: H04W4/02

CPC classification number: G01C21/206 ,  G01C23/00 ,  G01S5/16 ,  G01S5/163 ,  G01S19/48 ,  H04W4/024 ,  H04W4/026 ,  H04W4/33

Abstract: A method of determining data of a magnetic field fingerprint map includes: determining, at a server, a transformation of a mobile-device coordinate system of a mobile device to a reference coordinate system using roll information, pitch information, and yaw information of the mobile device relative to the reference coordinate system; obtaining, at the server, first indications of vector components of a magnetic field at a location of the mobile device, the first indications of vector components of the magnetic field being in the mobile-device coordinate system; and determining, at the server, second indications of vector components of the magnetic field using the first indications of vector components of the magnetic field and the transformation, the second indications of vector components of the magnetic field being indicative of vector components of the magnetic field at the location of the mobile device in the reference coordinate system.

Abstract translation: 一种确定磁场指纹图的数据的方法包括：在服务器处，使用所述移动装置的滚动信息，俯仰信息和偏航信息来确定移动装置的移动装置坐标系向基准坐标系的变换 设备相对于参考坐标系; 在所述服务器处获取在所述移动设备的位置处的磁场的矢量分量的第一指示，所述磁场的矢量分量的所述第一指示位于所述移动设备坐标系中; 以及使用所述磁场和所述变换的向量分量的所述第一指示，在所述服务器处确定所述磁场的矢量分量的第二指示，所述磁场的矢量分量的第二指示指示所述磁场的矢量分量 在参考坐标系中的移动设备的位置。

公开(公告)号：US20160258761A1

公开(公告)日：2016-09-08

申请号：US14959681

申请日：2015-12-04

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar JOVICIC ,  Shrinivas KUDEKAR

IPC: G01C21/20 ,  G01C23/00

CPC classification number: G01C21/206 ,  G01C23/00 ,  G01S5/16 ,  G01S5/163 ,  G01S19/48 ,  H04W4/024 ,  H04W4/026 ,  H04W4/33

Abstract: A method of determining data of a fingerprint map includes: obtaining visible light communication signals at a mobile device; determining yaw of the mobile device using the visible light communication signals; obtaining roll and pitch of the mobile device; determining a transformation of a mobile-device coordinate system to a reference coordinate system using the roll, pitch, and yaw; obtaining first indications of vector components of a field at a location of the mobile device; and sending, to a server, the first indications and the transformation; or determining second indications of vector components of the field using the first indications and the transformation, the second indications being indicative of vector components at the location of the mobile device in the reference coordinate system, and sending, to the server, the second indications; or sending the first indications to the server, and determining and sending the second indications to the server.

Abstract translation: 一种确定指纹图数据的方法包括：在移动设备处获得可见光通信信号; 使用所述可见光通信信号确定所述移动设备的偏航; 获得移动设备的滚动和俯仰; 使用所述滚动，俯仰和偏航确定移动设备坐标系到基准坐标系的变换; 获得在所述移动设备的位置处的场的向量分量的第一指示; 并向服务器发送第一指示和转换; 或使用所述第一指示和所述变换来确定所述场的向量分量的第二指示，所述第二指示指示所述参考坐标系中所述移动设备的位置处的向量分量，以及向所述服务器发送所述第二指示; 或将第一指示发送到服务器，以及确定并发送第二指示给服务器。