线性网络编码在协作通信中的应用

The Application of Linear Network Coding in Cooperative Communication System

协作通信是提高无线网络链路可靠性的最有效方法之一。文中将线性网络编码引入多用户协作通信系统中,提出新的中继转发方法。在中继转发阶段,参与协作的用户将机会侦听到的来自其它协作用户的数据和自身的数据进行线性网络编码,并转发出去。理论分析和仿真表明,与原有的基于异或编码方式的转发方法相比,本文的方法能获得更高的空间分集度,更低的系统中断概率。

Cooperative communication is one of the most efficient methods to improve reliability of wireless link. The linear network coding is introduced into multiuser cooperative communication system, and a new forwarding method is proposed. In forwarding phase, Users participating cooperation encode all data from other users with itself data by method of linear network coding, and forward them. Theoretical analysis and simulation shows that comparing with original method based on XOR encoding, our method can obtain higher spatial diversity and reduce system interruption probability.