一种低复杂性的伪随机交织器实现方案

A low complexity implementation for the pseudo random interleaver

分析了随机交织器在Ｔｕｒｂｏ 码中的重要作用，讨论了交织器的设计原则，指出在满足时延要求的前提下，交织深度应与数据帧大小相一致．在此基础上，针对加性白高斯噪声信道和Ｒａｙｌｅｉｇｈ 衰落信道条件，对交织深度与Ｔｕｒｂｏ 码性能的关系进行了计算机模拟，给出了一种采用ｍ 序列的伪随机交织器硬件电路实现方案，其复杂度与分组交织器相同，便于专用集成电路实现．

This paper analyzes the important role of the interleaver used in turbo codes, and describes the design rules of the random interleaver under the delay constraint. Then, the effect of the interleaver size on the performance of turbo codes is illustratively characterized over AWGN and flat Rayleigh fading channnels by using a computer. Finally, a hardware implementation scheme for the pseudo random interleaver is presented, which utilizes the m sequence and has low complexity.