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    Generation of polar codes with a variable block length utilizing
    11.
    发明授权
    Generation of polar codes with a variable block length utilizing 有权

    公开(公告)号：US10749633B2

    公开(公告)日：2020-08-18

    申请号：US16065077

    申请日：2016-08-17

    Applicant: QUALCOMM Incorporated

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

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

    Abstract: Polar codes may be generated with a variable block length utilizing puncturing. Some puncturing schemes consider punctured bits as unknown bits, and set the log likelihood ratio (LLR) for those bits to zero; while other puncturing schemes consider punctured bits as known bits, and set the LLR for those bits to infinity. Each of these puncturing schemes has been observed to provide benefits over the other under different circumstances, especially corresponding to different coding rates or different signal to noise ratio (SNR). According to aspects of the present disclosure, both puncturing schemes are compared, and the puncturing scheme resulting in the better performance is utilized for transmission.

    MUTUAL-INFORMATION BASED RECURSIVE POLAR CODE CONSTRUCTION
    12.
    发明申请
    MUTUAL-INFORMATION BASED RECURSIVE POLAR CODE CONSTRUCTION 审中-公开

    公开(公告)号：US20200036476A1

    公开(公告)日：2020-01-30

    申请号：US16478759

    申请日：2018-02-22

    Applicant: Qualcomm Incorporated

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

    IPC: H04L1/00 ,  H04L5/00

    Abstract: Methods, systems, and devices for wireless communication are described. To encode a vector of bits using a polar code, an encoder may allocate information bits of the vector to polarized bit-channels associated with a channel (e.g., a set of unpolarized bit-channels) used for a transmission. In some cases, the polarized bit-channels may be partitioned into groups associated with different values of some associated reliability metric (s). The information bits may be allocated to the polarized bit-channels based on the reliability metrics of the different polarized bit-channels and the overall capacity of a transmission. That is, the bit locations of a transmission may depend on the reliability metrics of different polarized bit-channels and the overall capacity of the transmission. To facilitate puncturing, the overall capacity of the transmission may be adjusted and the unpolarized bit-channels may be partitioned into polarized bit-channels based on the adjusted capacity.

    METHOD AND APPARATUS OF 128-DSQ DE-MAPPING IN 10GBASE-T SYSTEM
    13.
    发明申请
    METHOD AND APPARATUS OF 128-DSQ DE-MAPPING IN 10GBASE-T SYSTEM 审中-公开
    在10GBASE-T系统中128-DSQ去映射的方法和装置

    公开(公告)号：US20160182273A1

    公开(公告)日：2016-06-23

    申请号：US14910569

    申请日：2013-09-10

    Applicant: QUALCOMM INCORPORATED

    Inventor： Jian Li ,  Fuyun Ling ,  Changlong Xu ,  Yin Huang ,  Yisheng Xue ,  Jilei Hou

    IPC: H04L27/38 ,  H04L1/00

    CPC classification number: H04L27/38 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0058 ,  H04L5/12 ,  H04L25/03178 ,  H04L25/067

    Abstract: A method and apparatus for demapping a double squared quadrature amplitude modulated (DSQ) symbol is disclosed. One or more first log likelihood ratios (LLRs) are determined, for a first subset of constellation points of a corresponding DSQ constellation, using an LLR approximation. One or more second LLRs are determined, for a second subset of constellation points of the DSQ constellation, using a lookup table. The DSQ symbol is then demapped to one of a plurality of constellation points of the DSQ constellation based on the first and second LLRs. For some embodiments, the first subset of constellation points may correspond with an inner region of the DSQ constellation and the second subset of constellation points may correspond with an outer region of the DSQ constellation.

    Abstract translation: 公开了一种用于解映射双正交幅度调制（DSQ）符号的方法和装置。 对于对应DSQ星座的星座点的第一子集，使用LLR近似来确定一个或多个第一对数似然比（LLR）。 对于DSQ星座的星座点的第二子集，使用查找表来确定一个或多个第二LLR。 然后，基于第一和第二LLR，DSQ符号被映射到DSQ星座的多个星座点中的一个。 对于一些实施例，星座点的第一子集可以对应于DSQ星座的内部区域，并且星座点的第二子集可以对应于DSQ星座图的外部区域。

    Apparatus and methods for estimating optical Ethernet data sequences
    14.
    发明授权
    Apparatus and methods for estimating optical Ethernet data sequences 有权
    用于估计光以太网数据序列的装置和方法

    公开(公告)号：US09363110B2

    公开(公告)日：2016-06-07

    申请号：US14646360

    申请日：2013-01-08

    Applicant: QUALCOMM INCORPORATED

    Inventor： Haitao Zhang ,  Yin Huang ,  Jian Li ,  Yisheng Xue

    IPC: H03H7/30 ,  H04L25/02 ,  H04L25/03 ,  H04B10/60 ,  H04L1/00

    CPC classification number: H04L25/0212 ,  H04B10/60 ,  H04L1/0054 ,  H04L25/03057

    Abstract: A receiver is disclosed that includes a slicer having an input to receive a sequence of symbols exhibiting inter-symbol-interference (ISI). The slicer determines a state associated with each symbol based on a threshold. A feedback equalization unit is coupled to the slicer to apply equalization to the symbol fed to the slicer input based on prior detected symbol states. A Least-Mean-Square (LMS) unit cooperates with the slicer and feedback equalization unit to estimate a channel impulse response based on the equalized symbols. The LMS unit feeds the estimated channel impulse response to a Maximum-Likelihood-Sequence-Estimation (MLSE) unit to generate an estimated sequence of bits based on the estimated channel impulse response.

    Abstract translation: 公开了一种接收器，其包括具有用于接收呈现符号间干扰（ISI）的符号序列的输入的限幅器。 限幅器基于阈值确定与每个符号相关联的状态。 反馈均衡单元耦合到限幅器，以基于先前检测的符号状态对馈送到限幅器输入的符号施加均衡。 最小均方（LMS）单元与限幅器和反馈均衡单元协作以基于均衡符号来估计信道脉冲响应。 LMS单元将估计的信道脉冲响应馈送到最大似然序列估计（MLSE）单元，以基于所估计的信道脉冲响应来产生估计的比特序列。

    Rate-splitting construction of polar coded hybrid automatic repeat request (HARQ) scheme
    15.
    发明授权
    Rate-splitting construction of polar coded hybrid automatic repeat request (HARQ) scheme 有权

    公开(公告)号：US12074706B2

    公开(公告)日：2024-08-27

    申请号：US17310189

    申请日：2019-01-23

    Applicant: QUALCOMM Incorporated

    Inventor： Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Jing Jiang ,  Hao Xu

    IPC: H04L1/08

    CPC classification number: H04L1/08

    Abstract: Wireless communications systems and methods related to hybrid repeat request (HARQ) with rate splitting are provided. A first wireless communication device communicates, with a second wireless communication device, a first communication signal including a plurality of information bits. The first wireless communication device determines a number of bits in the plurality of information bits to be repeated in a second communication signal based on channel capacity information. The first wireless communication device communicates, with the second wireless communication device, the second communication signal including the plurality of information bits and a repetition of a subset of the plurality of information bits, where the subset of the plurality of information bits includes the determined number of bits.

    Equivalent puncture sets for polar coded re-transmissions
    18.
    发明授权
    Equivalent puncture sets for polar coded re-transmissions 有权

    公开(公告)号：US11791936B2

    公开(公告)日：2023-10-17

    申请号：US17866168

    申请日：2022-07-15

    Applicant: QUALCOMM Incorporated

    Inventor： Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Hao Xu

    IPC: H04L1/00 ,  H03M13/13 ,  H03M13/00 ,  H04L1/1812 ,  H04L1/1829

    CPC classification number: H04L1/0068 ,  H03M13/13 ,  H03M13/6306 ,  H03M13/6362 ,  H04L1/1819 ,  H04L1/1854

    Abstract: Wireless devices may use polar codes for encoding transmissions and may support combining transmissions to improve decoding reliability (e.g., by achieving chase combining and incremental redundancy (IR) gains). For example, an encoding device may puncture a set of mother code bits using different puncturing patterns to obtain different redundancy versions for a first transmission and a re-transmission. Each puncturing pattern may correspond to an equivalent decoding performance. In some cases, to obtain equivalent puncture sets, the encoding device may perform punctured index manipulation procedures on an initial puncturing pattern. A punctured index manipulation procedure may involve switching a binary state for a binary bit at a same binary bit index for each puncture index in a puncturing pattern. A device may receive the transmissions generated using the equivalent puncture sets and may combine the information for improved decoding reliability.

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