高码率Turbo码中确定性交织器的设计

Deterministic Interleaver Design for High-Rate Turbo Codes

交织器设计在Turbo码理论中具有重要地位 ,高码率Turbo码对交织器具有特殊要求。通过对影响交织器设计的 5个重要因素分析 ,研究了如何设计理想的Turbo码交织器 ,并讨论了 3种常见确定性交织器的映射函数以及在高码率Turbo码中的奇偶性设计。计算机模拟结果显示通过映射函数得到的 3种奇偶交织器实现简单 。

Interleaver design plays an important role in Turbo code theory, and high rate turbo codes have some special requirements on interleavers. Based on analysis of five key factors which have influences on the design of interleavers, a study is made on how to design a promising interleaver for turbo codes. Three commonly used mapping functions of deterministic interleavers are discussed, and their odd even design schemes for high rate turbo codes are presented. Computer simulation results show that the three odd even interleavers are easy to realize, and with them, satisfactory performances can be obtained over an additive White Gaussian Noise in high rate turbo code systems.