CAJ | 학술논문

本文借助降排序、动态选择器和矢量寄存器等模块，提出了一种卷积码 M 算法的矩阵实现方案，设计了一种具有并行处理能力的单一结构译码器．M 算法容易陷入次优的局部搜索区域，本文利用快检卷积码的快检特性，结合低密度校验码的核加运算和蔡氏算法的最近邻域扩展思想，建立了一种低开销的逃逸机制，帮助译码器快速摆脱局部最优解．仿真实验表明，基于逃逸机制的改进算法可获得约0．8db 的额外增益，充分证明了算法的可行性和有效性．
본문차조강배서、동태선택기화시량기존기등모괴，제출료일충권적마 M 산법적구진실현방안，설계료일충구유병행처리능력적단일결구역마기．M 산법용역함입차우적국부수색구역，본문이용쾌검권적마적쾌검특성，결합저밀도교험마적핵가운산화채씨산법적최근린역확전사상，건립료일충저개소적도일궤제，방조역마기쾌속파탈국부최우해．방진실험표명，기우도일궤제적개진산법가획득약0．8db 적액외증익，충분증명료산법적가행성화유효성．
With the help of some modules such as descending sort ,variable selector and vector register ,the paper presents a matrices scheme of M-algorithm ,and designs a single structure decoder with the parallel processing ability .M-algorithm is easy to get into the suboptimum local research area ,by combining the box-plus-operation of LDPC and the nearest neighbor idea of Chase algorithm ,a quick-look-in convolutional code which has the specialty of fast detection is used to establish a low-cost escape mecha-nism ,and it can free decoder from local optima faster .The simulation results demonstrate that the improved escape mechanism based algorithm can obtain an additional gain of 0 .8 dB ,it fully proves the feasibility and validity of algorithm .