Ka波段卫星ATM系统差错控制编码方案

Ka波段通信是当前卫星通信发展的热点 ,卫星异步传递模式 (ATM)技术代表了宽带数字卫星通信网络的研究方向 ,文章研究了适合Ka波段卫星ATM系统的差错控制编码方案。首先分析了卫星信道的特点以及对ATM信元传输所带来的影响 ,并给出了突发误码与信元丢失率 (CLR)关系的仿真曲线 ,然后讨论了六种具有代表性的卫星ATM差错控制编码方案。针对Ka波段宽带卫星通信的特点对六种方案进行了分析比较 ,其中的CASI/ALA以及RM Turbo方案为两种较好的选择。

Error-Control Coding Schemes for Ka-Band Satellite ATM Systems

Ka-band communication is a hot topic in satellite communications, and the satellite ATM technology represents the research trends of wideband digital satellite communication networks. This paper studied the schemes of error-control coding in Ka-band satellite ATM systems. At first, we analyzed the characteristics of satellite communication systems and their impacts on the transfer of ATM cells, and then presented some simulation results about the cell loss ratio (CLR) under burst-error circumstances. To resolve the problem of high CLR, six kinds of error-control coding schemes are discussed and compared according to the property of Ka-band satellite communications. Among them, CASI/ALA and RM-Turbo schemes are better candidates.