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1.发明授权公开(公告)号：US11496243B1
公开(公告)日：2022-11-08
申请号：US17307835
申请日：2021-05-04
摘要： 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.
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公开(公告)号：US20210273651A1
公开(公告)日：2021-09-02
申请号：US16805636
申请日：2020-02-28
发明人： Afshin Haftbaradaran , Ming Ta Lin , Shravan Kumar Reddy Garlapati , Alessandro Risso , Alexandre Pierrot , Harsha Narasimha Acharya , Subramanya Rao , Li Zhang
IPC分类号： H03M13/09 , H03M13/13 , H03M13/27 , G06F1/3287
摘要： Methods, systems, and devices for wireless communications are described. In some systems, a first device may transmit a signal to a second device including a number of error detection bits interleaved with a number of information bits. The second device may use the error detection bits to determine if the signal was received correctly, where each error detection bit may be associated with a set of information bits. The second device may progressively decode the signal and continuously perform an error detection calculation based on a first set of information bits associated with a first error detection bit. Based on the error detection calculation, the second device may calculate an expected error detection bit corresponding to the first error detection bit. The second device may compare the first error detection bit to the expected error detection bit. Other aspects and features are also claimed and described.
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公开(公告)号：US11595177B2
公开(公告)日：2023-02-28
申请号：US17084621
申请日：2020-10-29
发明人： Ming Ta Lin , Afshin Haftbaradaran , Shravan Kumar Reddy Garlapati , Cunzhen Liu , Alessandro Risso , Li Zhang
IPC分类号： H04L5/00
摘要： Methods, systems, and devices for wireless communications are described. A shared channel may include a set of tones carrying multiple types of control information multiplexed together. A wireless device may perform a tone classification method to determine individual subsets of tones from the set of tones for each type of control information to extract each type of control information. The wireless device may determine multiple subsets of tones correspond to multiple types of control information simultaneously based on different extraction parameters. For example, the wireless device may determine a total number of tones in a set of tones, a distance between any given two tones in the set of tones, an offset value, or any combination thereof for the extraction parameters. The wireless device may then use these extraction parameters to determine or extract two or more subsets of tones for two or more corresponding types of control information.
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公开(公告)号：US10700829B2
公开(公告)日：2020-06-30
申请号：US16268186
申请日：2019-02-05
发明人： Shravan Kumar Reddy Garlapati , Afshin Haftbaradaran , Alessandro Risso , Alexandre Pierrot , Chinmay Vaze , Hari Sankar , Li Zhang
IPC分类号： H04L5/00 , H04L1/00 , H04L27/26 , H03M13/13 , H03M13/29 , H04L1/18 , H03M13/09 , H04J11/00 , H04L25/03
摘要： 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.
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公开(公告)号：US11152953B2
公开(公告)日：2021-10-19
申请号：US16805636
申请日：2020-02-28
发明人： Afshin Haftbaradaran , Ming Ta Lin , Shravan Kumar Reddy Garlapati , Alessandro Risso , Alexandre Pierrot , Harsha Narasimha Acharya , Subramanya Rao , Li Zhang
IPC分类号： H03M13/09 , G06F1/3287 , H03M13/27 , H03M13/13
摘要： Methods, systems, and devices for wireless communications are described. In some systems, a first device may transmit a signal to a second device including a number of error detection bits interleaved with a number of information bits. The second device may use the error detection bits to determine if the signal was received correctly, where each error detection bit may be associated with a set of information bits. The second device may progressively decode the signal and continuously perform an error detection calculation based on a first set of information bits associated with a first error detection bit. Based on the error detection calculation, the second device may calculate an expected error detection bit corresponding to the first error detection bit. The second device may compare the first error detection bit to the expected error detection bit. Other aspects and features are also claimed and described.
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6.发明授权公开(公告)号：US10887053B1
公开(公告)日：2021-01-05
申请号：US16522350
申请日：2019-07-25
发明人： Alexandre Pierrot , Hari Sankar , Shravan Kumar Reddy Garlapati , Afshin Haftbaradaran , Alessandro Risso , Jae Ho Ryu , Ashok Mantravadi
IPC分类号： H04B7/00 , H04L1/00 , H04B17/336
摘要： 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.
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公开(公告)号：US10103843B1
公开(公告)日：2018-10-16
申请号：US15836309
申请日：2017-12-08
发明人： Cunzhen Liu , Alessandro Risso , Li Zhang
摘要： In an aspect, a method of encoding data for transmission includes reading, for a block of encoded data on which interleaving and rate-matching is to be performed, the block of encoded data from a buffer, by first and second interleaving and rate matching engines operating in parallel and, starting at first and second starting points of the buffer, respectively. Encoded output data includes the interleaved and rate matched data from both engines. In another aspect, a method of decoding received data includes reading data of a log likelihood ratio (LLR) buffer, by first and second de-interleaving and de-rate matching engines, starting at first and second starting points of the LLR buffer, respectively. Decoded output data includes de-interleaved and de-rate matched data of both engines.
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公开(公告)号：US11870576B2
公开(公告)日：2024-01-09
申请号：US17657115
申请日：2022-03-29
发明人： Hobin Kim , Hari Sankar , Alessandro Risso , Harsha Acharya , Alexei Yurievitch Gorokhov , Li Zhang
IPC分类号： H04L1/00
CPC分类号： H04L1/0061 , H04L1/0068
摘要： 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.
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公开(公告)号：US11784749B2
公开(公告)日：2023-10-10
申请号：US17651058
申请日：2022-02-14
发明人： Erman Koken , Gabi Sarkis , Hobin Kim , Hari Sankar , Omar Mehanna , Shravan Kumar Reddy Garlapati , Alessandro Risso , Afshin Haftbaradaran
IPC分类号： H04L1/00 , H03M13/13 , H03M13/00 , H04B1/7093
CPC分类号： H04L1/0057 , H03M13/13 , H04B1/7093 , H04L1/0041 , H04B2001/70935
摘要： 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.
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10.发明授权公开(公告)号：US11418294B2
公开(公告)日：2022-08-16
申请号：US17021361
申请日：2020-09-15
发明人： Cunzhen Liu , Alessandro Risso , Li Zhang
摘要： 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.
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