基于低码重分布的一类随机交织器设计

Design of random interleaver based on the distribution of low weights of turbo codes

提出一种新的Turbo码的随机交织器的设计方法。该方法不仅考虑了重 2自结尾序列对低码重分布的影响 ,还考虑了 2重重 2自结尾序列对低码重分布的影响。如果重 2和 2重重 2自结尾序列是Turbo码低码重分布的主要分量 ,用这种交织器就可以获得更大的最小码重。计算机仿真显示 ,无论是高斯白噪声信道还是衰落信道 ,与S交织器和仅消除重 2自结尾序列的交织器相比 。

Considering the weight-2 self terminating sequences and its two combination, a design method of random interleaver is presented. If the weight-2 self terminating sequences and its two combination are the main components of the low weight distributions of Turbo codes, a much higher minimum-weight can be obtained by the interleaver. The simulations show that the designed interleaver has a super performance to the other interleavers for both AWGN channel and fading channel.