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面向下行多天线传输的能效最优上行训练

, PP. 841-846

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Abstract:

针对时分双工(TDD,TimeDivisionDuplex)多天线系统的下行传输,研究了以能量效率(EE,EnergyEfficiency)最大为准则的上行训练设计问题.证明了存在信道估计误差时系统EE和频谱效率(SE,SpectrumEfficiency)上界是上行训练长度的凹函数,分析了信噪比和电路功耗等因素对两种准则下最优训练长度的影响.分析和仿真结果表明,当信噪比很高时,基于EE最优的设计将退化成基于SE最优的设计;而一般情况下,与最大化SE的训练设计相比,最大化EE要求系统配置更长的训练.

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