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多用户协作和中继的性能分析与比较
引用本文:朱义君,陈晋央,李瑛,田忠骏. 多用户协作和中继的性能分析与比较[J]. 通信技术, 2011, 44(1): 75-78
作者姓名:朱义君  陈晋央  李瑛  田忠骏
作者单位:信息工程大学,信息工程学院,河南,郑州,450002
基金项目:国家承大科技专项新一代宽带无线移动通信网资助项目
摘    要:
以蜂窝网的下行线路为例,描述了不采用协作、多用户协作、基于最优用户选择的多用户协作、多中继协作和基于最优中继选择的多中继协作等五种模式的具体场景和时隙分配示意图,给出了五种模式下的基站和目的用户之间的互信息和一帧内所消耗的总能量。对五种模式下中断概率进行了数值仿真。理论分析和仿真结果表明,多用户协作能获得较大的分集增益,而多中继协作的能量效率较高。信噪比受限条件下,无论多用户协作还是多中继协作,采用协作选择技术后,能量效率更高。

关 键 词:蜂窝网络  多用户协作  多中继协作  信噪比  互信息

Performance Comparison of Multi-User and Multi-Relay Cooperation
ZHU Yi-jun,CHEN Jin-yang,LI Ying,TIAN Zhong-jun. Performance Comparison of Multi-User and Multi-Relay Cooperation[J]. Communications Technology, 2011, 44(1): 75-78
Authors:ZHU Yi-jun  CHEN Jin-yang  LI Ying  TIAN Zhong-jun
Affiliation:(Institute of Information Engineering,Information Engineering University,Zhengzhou Henan 450002,China)
Abstract:
With the downlink of cellular network as a instance,the scenarios and the time-slot assignments schematic diagram in five patterns as with no cooperation,multi-user cooperation,multi-user cooperation based on the selection of optimal user,multi-relay cooperation and multi-relay cooperation based on the selection of optimal relay are described.The mutual information between the base-station and the desired user,and the total energy consumed within a frame of different patterns are given.The outage probability of different patterns are simulated.The theoretical analysis and numerical simulation reveal that the multi-user cooperation could achieve higher diversity gain while the energy efficiency of multi-relay cooperation is higher.Under the SNR constraint,both multi-user cooperation and multi-relay cooperation,with the selection technology of cooperation,could achieve higher energy efficiency.
Keywords:cellular network  multi-user cooperation  multi-relay cooperation  SNR  mutual information
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