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CoMP下行传输系统的联合最优参考序列设计

Keywords: 协作多点传输,下行,参考序列设计

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Abstract:

针对多小区协作传输系统,首先给出了频偏估计和信道估计的Cramer-RaoBound(CRB),作为理论上最优的训练序列的设计准则;然而通过分析发现,基于CRB的最优参考序列设计准则中不仅包含了信道的因素,而且还包含了协作基站频偏值的影响.由于基于CRB的最优参考序列设计过于复杂,因此转向次优的基于最小均方误差(MSE)的参考序列设计准则,并通过分析得出该准则下的最优参考序列是高斯序列.最后通过仿真,验证了高斯序列在最大似然估计下的性能.仿真结果显示:高斯序列检测性能逼近理论最优值CRB;通过与其他序列的检测性能进行比较,验证了其性能增益.

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