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TD-LTE-Advanced系统中一种新型8天线双码本设计方法

DOI: 10.13190/j.jbupt.2014.05.010, PP. 45-49

Keywords: TD-LTE-advanced,预编码,双码本,频谱效率

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Abstract:

提出了一种新型8天线双码本设计方法,有效提高了TD-LTE-Advanced系统频谱效率.该方法根据层映射的层数对码本分组,层数为1、2及5~8时,利用R8协议中4天线码本的满秩矩阵生成码本;层数为3、4时,将离散傅里叶变换矩阵与循环延迟分集技术相结合构造新码本.与R10协议中给出的8天线双码本相比,在反馈开销相同的情况下,新码本码字间距更大.仿真结果表明,在8发2收层数为2的条件下,新码本增益提高2dB以上;当信噪比为5dB时,新码本比现有码本的频谱效率高15%以上.

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