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    • 10. 发明授权
    • Channel interleaver having a constellation-based unit-wise permuation module
    • 信道交织器具有基于星座的单位置换模块
    • US08799735B2
    • 2014-08-05
    • US12655521
    • 2009-12-30
    • Ciou-Ping WuPei-Kai LiaoYu-Hao ChangYih-Shen Chen
    • Ciou-Ping WuPei-Kai LiaoYu-Hao ChangYih-Shen Chen
    • G06F11/00
    • H04L1/0066H04L1/0042H04L1/0071H04L27/34
    • A channel interleaver comprises a novel constellation-based permutation module. The channel interleaver first receives a plurality of sets of encoded bits generated from an FEC encoder. The encoded bits are distributed into multiple subblocks and each subblock comprises a plurality of adjacent bits. A subblock interleaver interleaves each subblock and outputs a plurality of interleaved bits. The constellation-based permutation module rearranges the interleaved bits and outputs a plurality of rearranged bits. The rearranged bits are supplied to a symbol mapper such that a plurality of consecutively encoded bits in the same set of the encoded bits generated from the FEC encoder is prevented to be mapped onto the same level of bit reliability of a modulation symbol. In addition, the plurality of adjacent bits of each subblock is also prevented to be mapped onto the same level of bit reliability to achieve constellation diversity and to improve decoding performance.
    • 信道交织器包括新颖的基于星座的置换模块。 信道交织器首先接收从FEC编码器生成的多组编码比特。 编码的比特被分配到多个子块中,并且每个子块包括多个相邻的比特。 子块交织器交织每个子块并输出多个交织比特。 基于星座的置换模块重新排列交织的比特并输出多个重新排列的比特。 重新排列的比特被提供给符号映射器,使得从FEC编码器生成的同一组编码比特中的多个连续编码比特被阻止被映射到调制符号的相同级别的比特可靠性。 此外,还防止了每个子块的多个相邻位被映射到相同级别的比特可靠性以实现星座分集并提高解码性能。