适用于Turbo码并行译码的无冲突交织器

Collision-free interleaver applied to parallel decoding Turbo codes

为了提高无冲突Turbo码并行译码的性能,提出了一种无冲突交织器的设计方法,通过把外信息写入一个矩阵,再对该矩阵的行和列进行S-random交织。仿真表明,该方法的距离谱与全随机交织器接近,误码率相对于同等复杂度算法的无冲突交织器有所改善,且随着帧长的增加,误码率改善越明显。因此,该方法改善了无冲突Turbo码并行译码的性能。

To improve the decoding performance of Parallel Decoding Turbo Codes （PDTC）, a memory collision-free interleaver to avoid the data collision was proposed. The information was written into a matrix first, and then S-random interleaving was done on its rows and columns. The simulation shows the distances spectrum of this interleaver is close to the full random interleaver, the bit error rate performance of PDTC is better than other interleavers which have the same algorithm complexity, and with the increase of the length frame, the improved result is more obvious. Hence this design has outstanding performances in PDTC.