一种新型的Turbo码短帧交织器的设计

Design of a Novel Short Frame Interleaver for Turbo Codes

交织器是Turbo码的关键组成部分,也是影响其性能的关键因素。Turbo码在低信噪比条件下的性能主要取决于其距离谱,而影响距离谱的一个关键因素就是交织器的设计。文章提出了一种新型的Turbo码短帧交织器的设计方法。这种交织器是通过确定每个相邻信息比特位之间的距离和首位信息比特的位置来设计,保证最小的互交织距离足够大且能够自由调节自交织距离。相比其他的交织器,其在突发信道有更好的性能,并且实现简单。

Interleaver plays an important role in the performance of corresponding Turbo code. The per-formance of Turbo codes at low SNR is mainly dependent on the distance spectrum, and one of the key factors af-fecting the distance spectrum is the design of interleaver. In this paper, design of a novel short frame interleaver for Turbo codes is proposed. This kind of interleaver is generated through ascertaining adjacent information bits dis-tances and position of the first bit , which guarantees large minimal self interleaving distance and minimal correlative interleaving distance. Compared with other interleavers, the interleaver is able to restrain the negative affection more effectively, which noise bursts bring, in addition, it is easy to implement.