一种基于OFDM的协同通信策略  

A Cooperative Communication Strategy Based on OFDM

作　　者：马绪[1] 王呈贵[1] 邱炜[1] 

机构地区：[1]解放军理工大学通信工程学院,南京210007

出　　处：《电讯技术》2009年第2期43-46,共4页Telecommunication Engineering

摘　　要：为了有效对抗频率选择性衰落,将正交频分复用(OFDM)技术应用于协同通信系统,针对该系统的特点,提出了一种带循环冗余校验(CRC)的选择子载波译码转发策略。应用此策略,中继节点可以根据信道估计的结果选取衰落较小的子载波转发被自己正确解码的信息。仿真结果表明,与传统的译码转发策略相比,该策略具有更好的误码性能。OFDM technology is used in cooperative communication system to antagonize frequency- selective-fading. A new cooperative strategy with CRC （ Cyclic Redundancy Check ） which accords with this cooperative communication system is proposed. Applying this strategy to the cooperative communication system, the relay-node can select those subcarriers which fade less over the channel to transmit the information based on the result of channel estimation. The simulation results show that the performance of this strategy is better than that of the traditional decode-and-forward （ DF ） strategy.

关 键 词：正交频分复用 协同通信 译码转发 分集增益 

分 类 号：TN929.5[电子电信—通信与信息系统]