一种基于空频和星座编码的高效编码协作  

Efficient Coded Cooperation Based on Space-frequency and Coordinate Coding

作　　者：牛兰奇[1,2] 张太镒[1] 张璟[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049 [2]西安理工大学自动化与信息工程学院,西安710048

出　　处：《系统仿真学报》2010年第1期140-143,共4页Journal of System Simulation

基　　金：国家自然科学基金(60602034)

摘　　要：协作分集可以有效地减轻无线信道衰落、改善无线通信系统性能。针对正交频分复用(OFDM)系统,提出一种高效编码协作协议。该协议将空频编码和星座编码相结合,可以提高频谱效率。推导了该协议的成对错误概率,分析了协作分集性能,给出了多径衰落信道下Viterbi译码器的判决度量计算公式。理论分析与仿真结果表明:新编码协作协议可以获得高频谱效率,用户间信道延迟扩展对系统误比特率(BER)性能影响较小,而上行链路信道的延迟扩展对系统BER性能影响较大。Cooperative diversity can mitigate the fading of wireless channels and improve the performance of wireless communication systems. For the orthogonal frequency division multiplexing （OFDM） systems, an efficient coded cooperative protocol was proposed which combined space-frequency coding with coordinate coding and can increase spectrum efficiency. The pair-wise error probability of proposed protocol was derived, the cooperative diversity performance of proposed protocol was analyzed and the computing formula of Viterbi decoder decision metric over multipath fading channels was given. Theoretical analysis and simulation results show that the new coded cooperative protocol can achieve high spectrum efficiency, the delay spread of inter-user channels makes little impact on system bit error rate （BER） performance and the delay spread of uplink channels makes great impact on system BER performance.

关 键 词：协作分集 编码协作 正交频分复用 空频编码 星座编码 

分 类 号：TN911[电子电信—通信与信息系统]