公开(公告)号：US10340949B2

公开(公告)日：2019-07-02

申请号：US15709400

申请日：2017-09-19

Applicant: QUALCOMM Incorporated

Inventor： Joseph Binamira Soriaga ,  Gabi Sarkis ,  Shrinivas Kudekar ,  Thomas Richardson ,  Vincent Loncke

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

Abstract: Aspects of the present disclosure relate to low density parity check (LDPC) coding utilizing LDPC base graphs. Two or more LDPC base graphs may be maintained that are associated with different ranges of overlapping information block lengths. A particular LDPC base graph may be selected for an information block based on the information block length of the information block. Additional metrics that may be considered when selecting the LDPC base graph may include the code rate utilized to encode the information block and/or the lift size applied to each LDPC base graph to produce the information block length of the information block.

公开(公告)号：US20190052400A1

公开(公告)日：2019-02-14

申请号：US16058196

申请日：2018-08-08

Applicant: QUALCOMM Incorporated

Inventor： Joseph Binamira Soriaga ,  Shrinivas Kudekar ,  Thomas Joseph Richardson ,  Gabi Sarkis ,  Jing Jiang

IPC: H04L1/00 ,  H03M13/11 ,  H04L1/08

Abstract: Methods, systems, and devices for wireless communication are described. In some examples, a wireless device (e.g., a user equipment (UE) or a base station) may encode a codeword from a set of information bits using an LDPC code. The wireless device may then transmit multiple versions of the codeword to improve the chances of the codeword being received. In some aspects, the wireless device may use the techniques herein to generate self-decodable redundancy versions of the codeword to be transmitted to the receiving device. Accordingly, a receiving device may be able to identify information bits from one or more redundancy versions of the codeword even if the receiving device failed to receive an original transmission of the codeword.

公开(公告)号：US20170109313A1

公开(公告)日：2017-04-20

申请号：US14885942

申请日：2015-10-16

Applicant: QUALCOMM Incorporated

Inventor： Urs Niesen ,  Shrinivas Kudekar

IPC: G06F13/42 ,  G06F1/10

CPC classification number: G06F13/4282 ,  G06F1/10 ,  H04B3/32 ,  H04L12/40 ,  H04L12/6418

Abstract: System, methods, and apparatus are described for transmitting encoded bits over a bus by conditionally embedding dynamically shielded information, in an example, the apparatus transmits a first group of encoded bits over a bus, generates a second group of encoded bits to be transmitted over the bus, where a first subset of the second group of encoded bits are encoded to avoid crosstalk-inducing bit transitions on adjacent lines of the bus, and configures one or more encoded bits of a second subset of the second group of encoded bits to ensure that the second group of encoded bits includes parity information and/or clock information, while further ensuring that crosstalk-inducing bit transitions in the second group of encoded bits are avoided.

公开(公告)号：US11671120B2

公开(公告)日：2023-06-06

申请号：US17020281

申请日：2020-09-14

Applicant: QUALCOMM Incorporated

Inventor： Shrinivas Kudekar ,  Se Yong Park ,  Alexandros Manolakos ,  Krishna Kiran Mukkavilli ,  Vincent Loncke ,  Joseph Binamira Soriaga ,  Jing Jiang ,  Thomas Joseph Richardson

IPC: H03M13/00 ,  H04L1/00 ,  H03M13/03 ,  H03M13/11 ,  H04L1/18 ,  H04L1/1812

CPC classification number: H03M13/6527 ,  H03M13/03 ,  H03M13/036 ,  H03M13/1102 ,  H03M13/116 ,  H03M13/1137 ,  H03M13/6362 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0069 ,  H04L1/1819

Abstract: Certain aspects of the present disclosure generally relate to techniques for puncturing of structured low density parity check (LDPC) codes. A method for wireless communications by wireless node is provided. The method generally includes encoding a set of information bits based on a LDPC code to produce a code word, the LDPC code defined by a matrix having a first number of variable nodes and a second number of check nodes, puncturing the code word to produce a punctured code word, wherein the puncturing is performed according to a first puncturing pattern designed to puncture bits corresponding to one or more of the variable nodes having a certain degree of connectivity to the check nodes, and transmitting the punctured code word.

公开(公告)号：US20220069841A1

公开(公告)日：2022-03-03

申请号：US17522693

申请日：2021-11-09

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Shrinivas Kudekar ,  Thomas Joseph Richardson ,  Joseph Binamira Soriaga

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

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：US11211946B2

公开(公告)日：2021-12-28

申请号：US16336213

申请日：2017-07-11

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Shrinivas Kudekar ,  Thomas Richardson ,  Joseph Binamira Soriaga

IPC: H03M13/00 ,  H03M13/09 ,  H03M13/11 ,  H03M13/13 ,  H03M13/29 ,  H04L1/18

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：US11206626B2

公开(公告)日：2021-12-21

申请号：US16719758

申请日：2019-12-18

Applicant: QUALCOMM Incorporated

Inventor： Bilal Sadiq ,  Juergen Cezanne ,  Shrinivas Kudekar ,  Navid Abedini ,  Muhammad Nazmul Islam

IPC: H04W56/00 ,  H04L1/00 ,  H04L5/00 ,  H03M13/13 ,  H04W72/00

Abstract: An apparatus are provided for wireless communication at a base station with improved PBCH construction and decoding. The base station apparatus constructs a PBCH payload, wherein a bit location is selected for encoding a plurality of bits of the PBCH based on an estimated reliability for the corresponding bits location wherein the plurality of bits comprises frozen bits, unknown bits that are unknown to a user equipment, and potentially known bits that are potentially known by the user equipment. The apparatus transmits the PBCH payload in at least one of a plurality of SS blocks. A UE receiving the PBCH decodes the PBCH based on a successive decoding order. The successive decoding order may be based on an estimated reliability for the corresponding bits, e.g., in which potentially known bits are decoded prior to unknown bits.

公开(公告)号：US10686556B2

公开(公告)日：2020-06-16

申请号：US15870197

申请日：2018-01-12

Applicant: QUALCOMM Incorporated

Inventor： Shrinivas Kudekar ,  Gabi Sarkis ,  Thomas Richardson

IPC: H04L1/00 ,  H03M13/13

Abstract: Aspects of the disclosure relate to polar coding. A polar codeword may be generated by sorting a plurality of synthetic channels utilized for transmission of the polar codeword over an air interface in order of reliability utilizing a convex combination of the mutual information calculated for each synthetic channel based on an Additive White Gaussian Noise (AWGN) channel and the mutual information calculated for each synthetic channel based on a binary erasure channel. A polar codeword may further be generated by sorting the plurality of synthetic channels in order of reliability utilizing cumulative sums calculated for each synthetic channel. Each cumulative sum may be calculated from a binary representation of a position of the synthetic channel within the plurality of synthetic channels.

公开(公告)号：US10560910B2

公开(公告)日：2020-02-11

申请号：US15926884

申请日：2018-03-20

Applicant: QUALCOMM Incorporated

Inventor： Bilal Sadiq ,  Juergen Cezanne ,  Shrinivas Kudekar ,  Navid Abedini ,  Muhammad Nazmul Islam

IPC: H04W56/00 ,  H04W72/00 ,  H04L5/00 ,  H04L1/00

Abstract: An apparatus is provided for wireless communication at a base station with improved PBCH construction and decoding. The base station apparatus constructs a PBCH payload, wherein a bit location is selected for encoding a plurality of bits of the PBCH based on an estimated reliability for the corresponding bits location wherein the plurality of bits comprises frozen bits, unknown bits that are unknown to a user equipment, and potentially known bits that are potentially known by the user equipment. The apparatus transmits the PBCH payload in at least one of a plurality of SS blocks. A UE receiving the PBCH decodes the PBCH based on a successive decoding order. The successive decoding order may be based on an estimated reliability for the corresponding bits, e.g., in which potentially known bits are decoded prior to unknown bits.

公开(公告)号：US10419176B2

公开(公告)日：2019-09-17

申请号：US15171941

申请日：2016-06-02

Applicant: QUALCOMM Incorporated

Inventor： Saurabha Tavildar ,  Thomas Richardson ,  Shrinivas Kudekar

IPC: H04L5/00 ,  H04W72/04 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18

Abstract: Various aspects of the present disclosure provide for methods, apparatus, and computer software for transmitting in-band control information in a wireless communication channel. A control and data information coding scheme is utilized to reduce the block error rate (BLER) of in-band control information in various scenarios. A subframe carries coded control information, coded data information, and coded control-data information for reducing the BLER of the in-band control information. The coded control information and coded data information are mix-coded to generate coded control-data information.