基于DRP交织器的Turbo码码率设计

删余是构造不同码率Turbo码的主要方法，删余方案和交织器类型对于Turbo码的性能有重要影响。本文使用DRP交织器，分析其算法。然后以周期删余得到不同的码率，但性能降低。通过比较各个删余方案的Turbo码的低码重分布，选择出有最大最小码重值的方案，系统性能得到提高。仿真结果表明，基于DRP交织器的Turbo码和删余方案相结合实现了不同码率的输出，同时可以使系统性能提高。

Rate Design of Turbo Codes based on DRP Interleaver

Puncturing is a predominant strategy for constructing different rates of Turbo codes. Puncturing scheme and the type of interleavers are crucial to the performance of Turbo codes. In this paper, the dithered relative prime interleaver is employed and its algorithm analyzed, then different rates are obtained by periodic puncturing, but the performance is lowered. However, the system performance is improved by comparing the distributions of low-weight codewords of the various puncturing scheme for Turbo codes and choicing scheme which has the largest minimum weight of codewords. Simulation results show that Turbo codes based on DRP interleaver in combination with puncturing scheme could achieve different rates of output, including the improvement of system performance.