摘要
Turbo码之译码过程通常采用LOG-MAP算法的迭代译码,在获得很好的译码性能的同时,也造成了巨大的译码延迟,因而限制了其实际应用。为了降低译码延迟,通常采用分块并行译码方案,将译码器接收到的长帧分割为长度较小的子帧。对基于LOG-MAP算法的并行译码方案进行仿真实现,结果表明并行译码方案在获得很好的译码延时的同时,也存在误比特率性能的下降,即所谓分块效应。
LOG-MAP algorithm is usually adopted for the iterative decoding of Turbo, which leads to the huge decoding delay while generating excellent decoding performance. To reduce decoding delay, people usually adopt the deblocking parallel decoding scheme, dividing long frame received by encoder into shorter sub - frames. The results show that the parallel decoding scheme could reduce the bit error rate while procuring good decoding delay, namely the socalled deblocking effect.
