公开(公告)号：US20230318741A1

公开(公告)日：2023-10-05

申请号：US17657115

申请日：2022-03-29

Applicant: QUALCOMM Incorporated

Inventor： Hobin KIM ,  Hari SANKAR ,  Alessandro RISSO ,  Harsha ACHARYA ,  Alexei Yurievitch GOROKHOV ,  Li ZHANG

IPC: H04L1/00

CPC classification number: H04L1/0061 ,  H04L1/0068

Abstract: An apparatus for wireless communication is provided. The apparatus may be a receiver device that includes an error correction decoder, such as a low-density parity check (LDPC) decoder. The apparatus may achieve power savings and/or operation cycle savings by disabling the error correction decoder in scenarios where bits of a codeword in a signal transmission are received without errors. The apparatus obtains a first set of bits of a codeword, wherein the codeword includes the first set of bits and a second set of bits, and wherein the second set of bits is punctured. The apparatus recovers the second set of bits based on at least the first set of bits and determines whether to operate an error correction decoder based on a result of an error detection operation performed on the codeword using the first set of bits and the second set of bits.

公开(公告)号：US20220360365A1

公开(公告)日：2022-11-10

申请号：US17307835

申请日：2021-05-04

Applicant: QUALCOMM Incorporated

Inventor： Shravan Kumar Reddy GARLAPATI ,  Afshin HAFTBARADARAN ,  Alessandro RISSO ,  Li ZHANG

IPC: H04L1/00 ,  H04W72/04 ,  H04W76/11

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiving node may determine a cyclic redundancy check (CRC) based at least in part on log-likelihood ratios (LLRs) associated with downlink control information (DCI) received from a transmitting node. The receiving node may perform a full unmasking of the CRC using a radio network temporary identifier (RNTI) based at least in part on a descrambling of the CRC with the RNTI, wherein a number of bits associated with the RNTI is associated with a number of bits associated with the CRC. The receiving node may initiate an early termination of a decoding of the LLRs based at least in part on the full unmasking of the CRC. Numerous other aspects are described.

公开(公告)号：US20210091895A1

公开(公告)日：2021-03-25

申请号：US17021361

申请日：2020-09-15

Applicant: QUALCOMM Incorporated

Inventor： Cunzhen LIU ,  Alessandro RISSO ,  LI ZHANG

IPC: H04L1/18 ,  H04L1/00

Abstract: An apparatus (e.g., receive chain) for wireless communications may perform de-interleaving, de-rate matching, and hybrid automatic repeat request (HARQ) combining in a single step. The apparatus may include a data pool configured to store HARQ log likelihood ratio (LLR) data from previous transmissions. The apparatus may include a HARQ onload controller configured to load HARQ LLR data from the HARQ data pool into a HARQ buffer. The apparatus may include an LLR buffer configured to store received demodulated, interleaved, and rate matched LLR data. The apparatus may include a plurality of processing engines configured to, starting at different locations of the LLR buffer: receive new input data from the LLR buffer; combine the HARQ LLR data from the HARQ buffer with the new input data to generate de-interleaved, de-rate matched, and HARQ combined data; and write the de-interleaved, de-rate matched, and HARQ combined data into the HARQ buffer.

公开(公告)号：US20230261785A1

公开(公告)日：2023-08-17

申请号：US17651058

申请日：2022-02-14

Applicant: QUALCOMM Incorporated

Inventor： Erman KOKEN ,  Gabi SARKIS ,  Hobin KIM ,  Hari SANKAR ,  Omar MEHANNA ,  Shravan Kumar Reddy GARLAPATI ,  Alessandro RISSO ,  Afshin HAFTBARADARAN

IPC: H04L1/00 ,  H03M13/13 ,  H04B1/7093

CPC classification number: H04L1/0057 ,  H03M13/13 ,  H04L1/0041 ,  H04B1/7093 ,  H04B2001/70935

Abstract: An apparatus may be configured to receive a polar-encoded transmission comprising at least one intermediate node associated with a first configuration of frozen leaf nodes and information leaf nodes. The apparatus may further be configured to apply an FHT to a first set of values associated with a first intermediate node of the at least one intermediate node to generate a second set of values associated with the first intermediate node. The apparatus may also be configured to select, based on the second set of values, one or more paths associated with the first intermediate node for a SSCL decoding. The apparatus may further be configured to calculate a path metric for each of the selected one or more paths associated with the first intermediate node.

公开(公告)号：US20210028886A1

公开(公告)日：2021-01-28

申请号：US16522350

申请日：2019-07-25

Applicant: QUALCOMM Incorporated

Inventor： Alexandre PIERROT ,  Hari SANKAR ,  Shravan Kumar Reddy GARLAPATI ,  Afshin HAFTBARADARAN ,  Alessandro RISSO ,  Jae Ho RYU ,  Ashok MANTRAVADI

IPC: H04L1/00 ,  H04B17/336

Abstract: Aspects described herein relate to decoding downlink control information (DCI) based on multiple DCI sizes. A first hypothesis of multiple hypotheses for decoding a communication received in a control channel search space, wherein the multiple hypotheses are based on different corresponding DCI sizes can be determined. The communication received in the control channel search space can be decoded based on the first hypothesis. For each of the multiple hypotheses and based on the different corresponding DCI sizes, information bits can be extracted from the communication as decoded. For each extracting of the information bits, cyclic redundancy check (CRC) can be performed based on one of the different corresponding DCI sizes to determine whether extracting of the information bits yields DCI.

公开(公告)号：US20190253213A1

公开(公告)日：2019-08-15

申请号：US16268186

申请日：2019-02-05

Applicant: QUALCOMM Incorporated

Inventor： Shravan Kumar Reddy GARLAPATI ,  Afshin HAFTBARADARAN ,  Alessandro RISSO ,  Alexandre PIERROT ,  Chinmay VAZE ,  Hari SANKAR ,  Li ZHANG

IPC: H04L5/00 ,  H04L27/26 ,  H04L1/00

Abstract: Certain aspects of the present disclosure generally relate to techniques for combining a plurality of decision metrics of a scrambled payload in a 5G wireless communications system. For example, in some cases, combining decision metrics of a scrambled payload may generally involve receiving a first payload at a receiver that was scrambled both before and after encoding, generating a second payload at the receiver with selectively set payload mask bits, and using the selectively-set payload mask bits in the second payload to descramble the first payload.