卫星通信中Turbo乘积码的快速译码

Fast decoding of Turbo product code in satellite communications

随着Turbo技术的不断发展,由于其译码性能接近于香农极限被应用于各个领域。在卫星通信中Turbo乘积码(TPC)被得到应用,且结构多样化。先简要介绍了Turbo乘积码的编译码原理,再对国际通信卫星上几种特殊码率TPC码的码字结构进行了分析,给出了一种便于实现的译码算法和流程,最后对迭代译码的效果进行了仿真和评估。仿真结果证明,在信噪比6dB时,经过4次迭代的代数译码误码率ERC降到10-7附近,译码数据可以满足通信侦察分析的需求。

As it developed,the performance of Turbo decoding can be near the Shannon limit,Turbo codes is being used in all kinds of field.Turbo product code（TPC） is being used in satellite communication and present diversification structure.The paper briefly introduces the coding and decoding principles of Turbo product code at first,analyses the code structure of several special code rates of Turbo product code in intestate,provides decoding algorithm and process which are easy to be realized,and simulates and evaluates the effects of iterative decoding at last.The result of emulation has proven that when signal-to-noise ratio is 6 dB,the bit error rate of algebraic decoded data can be reduced to be around 10-7 after 4 iterations,and decoded data can meet the need of communication reconnaissance and analysis.