基于PSK的非对称物理层网络编码

PSK-based Asymmetric Physical Layer Network Coding

在非对称的双向中继传输中,传统的基于比特异或的网络编码方案并不能取得最好的性能。一个简单的例子就可以说明传统的补零异或方案的缺陷,而导致这种缺陷的原因是设计自由度的缺乏。一种基于PSK的网络编码方案,配合解调前解码的方案,能够取得良好的性能,并且大大的简化非对称物理层网络编码方案的设计。而且这种方案能够方便的被用于有信道编码的系统,仅仅给系统带来少量的额外负担。

In asymmetric two-way relay transmission with network coding,the traditional bit-level XOR-based scheme couldn＇t achieve the best performance.The inefficiency of traditional zero-padding XOR is caused by the lack of design freedom,and this could be proved with a simple example.A PSK-based network coding scheme,in combination with a decode-before-demodulate scheme,could achieve good performance.Moreover,this scheme could greatly simplify the design of asymmetric physical layer network coding,and be applied to channel coded systems in limited expense.