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    • 84. 发明申请
    • Low-Power Low Density Parity Check Decoding
    • 低功耗低密度奇偶校验解码
    • US20160204802A1
    • 2016-07-14
    • US15075255
    • 2016-03-21
    • Maxlinear, Inc.
    • Mingrui ZhuCurtis LingTimothy Gallagher
    • H03M13/11
    • H03M13/1114H03M13/1111H03M13/1125H03M13/1128H03M13/1131H03M13/1137H03M13/114H03M13/1165H03M13/616H03M13/6505H04L1/0045
    • In an example implementation of this disclosure, a message passing low density parity check (LDPC) decoder may, during decoding of a first group of bits, lock a first variable node upon a bit-value probability of the first variable node reaching a determined threshold, and lock a first check node upon all variable nodes connected to the first check node being locked. The LDPC decoder may cease decoding the first group of bits upon all variable nodes of the LDPC decoder being locked, all check nodes of the LDPC decoder being locked, reaching a maximum number of iterations, or reaching a timeout. During a particular iteration of the decoding of the first group of bits in which the first variable node is locked, the LDPC decoder may refrain from generating a bit-value probability for the locked first variable node.
    • 在本公开的示例实现中,在低位奇偶校验(LDPC)解码器的消息传送期间,在第一比特组解码期间,可以在第一可变节点达到确定阈值的比特值概率时锁定第一可变节点 并且在连接到第一校验节点被锁定的所有变量节点上锁定第一校验节点。 所述LDPC解码器可以在所述LDPC解码器的所有可变节点被锁定,所述LDPC解码器的所有校验节点被锁定,达到最大迭代次数或达到超时之后,停止解码所述第一组位。 在第一可变节点被锁定的第一组比特的解码的特定迭代期间,LDPC解码器可以避免为锁定的第一可变节点生成比特值概率。
    • 90. 发明申请
    • LDPC DECODER WITH EFFICIENT CIRCULAR SHIFTERS
    • 具有有效圆形透镜的LDPC解码器
    • US20160094245A1
    • 2016-03-31
    • US14499284
    • 2014-09-29
    • APPLE INC.
    • Asaf LandauTomer Ish-ShalomYonathan Tate
    • H03M13/11H03M13/00
    • H03M13/116H03M13/1102H03M13/1111H03M13/1137H03M13/1165H03M13/15H03M13/271H03M13/616H03M13/6552H03M13/6555H04L1/0057
    • A decoder includes variable-node circuitry, check-node circuitry and a Message Passing (MP) module, which includes multiple configurable partial cyclic shifters that each supports only a partial subset of shift values out of a full range of shift values 0 . . . L−1. The variable-node circuitry and check-node circuitry are configured to exchange messages with one another in accordance with a parity check matrix that represents a respective Quasi-Cyclic (QC)-Low Density Parity Check (LDPC) Error Correcting Code (ECC) and that includes L-by-L sub-matrices, and to process the exchanged messages to decode a given code word that was encoded using the QC-LDPC ECC. The MP module is configured to schedule the variable-node circuitry and check-node circuitry that are interconnected in accordance with a respective sub-matrix to exchange L messages simultaneously by assigning a given partial cyclic shifter to shift the L messages cyclically a number of positions that depends on a structure of the respective sub-matrix.
    • 解码器包括可变节点电路,校验节点电路和消息传递(MP)模块,消息传递(MP)模块包括多个可配置的部分循环移位器,每个移位器仅支持移位值0的全范围内的移位值的部分子集。 。 。 L-1。 可变节点电路和校验节点电路被配置为根据表示相应的准循环(QC) - 低密度奇偶校验(LDPC)纠错码(ECC)的奇偶校验矩阵和彼此之间的交换消息 其包括L乘L子矩阵,并处理所交换的消息以解码使用QC-LDPC ECC编码的给定码字。 MP模块被配置为根据相应的子矩阵来调度互连的可变节点电路和校验节点电路,以通过分配给定的部分循环移位器来周期性地移动L个消息来同时交换L个消息 这取决于相应子矩阵的结构。