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多中继协作通信系统容量分析及中继选择协作分集策略 被引量:4
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作者 俞菲 胡莹 +1 位作者 巴特尔 杨绿溪 《信号处理》 CSCD 北大核心 2013年第12期1660-1669,共10页
本文针对多中继辅助通信系统,将系统建模为一个两跳通信链路,并进行了系统容量分析。针对两种特殊情况:用户端接收噪声方差远小于中继端接收噪声方差和中继端接收噪声方差远小于用户端接收噪声方差的情况,本文具体给出了系统传输容量上... 本文针对多中继辅助通信系统,将系统建模为一个两跳通信链路,并进行了系统容量分析。针对两种特殊情况:用户端接收噪声方差远小于中继端接收噪声方差和中继端接收噪声方差远小于用户端接收噪声方差的情况,本文具体给出了系统传输容量上限与协作中继个数之间的关系。基于容量的分析,本文设计了两种中继选择策略。在第一种情况下,根据中继与用户间的信道特征值对多路数据流分别选取不同的中继子信道进行传输;在第二种情况下,选择一个信道条件最好的中继完成多路数据流的并行传输。仿真分析表明,不同的信道环境需要选择不同的中继选择策略。 展开更多
关键词 系统容量 中继选择 协作通信 两跳通信系统
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Uplink Power Saving Potential of Cellular System with Fixed Relays
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作者 史宏逵 戎蒙恬 +1 位作者 刘涛 喻丹 《Journal of Shanghai Jiaotong university(Science)》 EI 2007年第2期223-228,233,共7页
This paper presented a scheme of relayed cellular mobile telecommunication network,which only employs fixed digital relays and not more than two-hop relay routes.Power saving potential of the network is deeply studied... This paper presented a scheme of relayed cellular mobile telecommunication network,which only employs fixed digital relays and not more than two-hop relay routes.Power saving potential of the network is deeply studied under the assumption of not occupying additional frequency bands(i.e.relays share the same frequency bands as used by the base stations).Theoretical analysis and simulation results have both shown that,with the same radio coverage requirement,the necessary effective transmission powers in such a relayed network have greatly decreased compared to conventional cellular network. 展开更多
关键词 digital relay fixed relay two-hop cellular system power saving
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