摘要
阐述了对流层散射信道恶劣的传输环境,表明它的衰落特性。介绍了LDPC码的基本原理,分析了迭代译码的更新过程以及LDPC码的内交织性。为了在对流层散射通信中有效应用LDPC码,研究了信道特性与编码性能之间的关系,对LDPC码在散射通信中的性能进行了仿真,结果表明,在对流层散射通信中,信道的衰落相关性对编码性能有非常重要的影响,给出了相应的参考曲线,为LDPC码的应用提供先验信息。
The bad transmission environment of tropescatter communication channel is illustrated and its fading characteristic is indicated. LDPC codes are introduced briefly and their iterative decoding process and build-in interleavers are analyzed. It is necessary to study the relation between the channel characteristic and the coding gain so that LDPC codes can be applied efficiently. The performance simulation of LDPC codes in tropescatter communication is conducted. The results show that fading correlation has important influence on coding performance, and the corresponding curves are introduced, which earl be used for the application of LDPC codes.
出处
《无线电通信技术》
2008年第4期16-18,共3页
Radio Communications Technology
关键词
散射通信
LDPC
衰落相关性
性能分析
tropescatter communication
LDPC
fading correlation
performance analysis
