一种串行Turbo-DFH迭代解调译码方案

A Serial Turbo-DFH Iterative Decoding Scheme

该文将差分跳频(DFH)系统的频率转移过程视为一种编码,提出了一种串行Turbo-DFH迭代解调译码方案。该方案的编码器由外编码器,交织器和差分跳频转移函数串行级联组成,译码器采用串行迭代结构译码。并针对DFH系统的特点,推导了一种新的DFH系统软输入软输出算法。仿真结果表明,该解调译码方案相对传统的DFH解调算法,性能得到了明显的改善。

A serial Turbo-DFH iterative demodulation and decoding scheme is proposed, with regarding the frequency transition as some code. In the scheme, the encoder consists of an outer encoder and an interweaver, serially concatenating with a transition function. At the decoder, a serial iterative structure is adopted to decode the codes. A novel soft-input and soft-output algorithm for DFH system is deduced. The simulated result shows that compared with the traditional DFH demodulation algorithm, the performance is improved obviously.