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Forum 高速Viterbi译码器中加-比-选单元的设计与实现
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高速Viterbi译码器中加-比-选单元的设计与实现

vhe1981
vhe1981 over 14 years ago
英文篇名】Design and implementation of add-compare-select unit in high speed Viterbi decoder
【作者中文名】张昌芳; 雷菁;
【作者英文名】ZHANG Chang-fang; LEI Jing (College of Electronic Science and Engineering; National Univ. of Defense Technology; Changsha 410073; China);
【作者单位】国防科技大学电子科学与工程学院; 国防科技大学电子科学与工程学院 长沙410073;
【文献出处】信息技术, Information Technology, 编辑部邮箱 2004年 12期 
期刊荣誉:ASPT来源刊  CJFD收录刊
【关键词】Viterbi译码; 一步加-比-选; M步加-比-选; 流水线; FPGA;
【英文关键词】Viterbi decoding; 1-step add-compare-select; M-step add-compare-select; pipeline; FPGA;
【摘要】限制高速Viterbi译码实现的"瓶颈"为具有非线性反馈特征的"加-比-选"单元。文献[3]在分析"加-比-选"运算代数结构的基础上提出了M步"加-比-选"算法。本文进一步发掘了该算法的并行性,并利用FPGA内寄存器资源丰富的特点,在Xilink的FPGA上采用流水线结构实现了基于M步"加-比-选"算法的"加-比-选"单元。仿真结果表明,该方案有效地克服了传统"加-比-选"单元的"瓶颈"效应,极大地提高了Viterbi译码器的译码速率。
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