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电子学报  2014 

混合衰落信道下存在反馈时延的多天线中继性能分析

DOI: 10.3969/j.issn.0372-2112.2014.01.006, PP. 36-41

Keywords: 放大转发中继系统,混合衰落信道,波束成形,性能分析

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Abstract:

研究了混合Rayleigh-Rician衰落信道下,存在反馈时延的多天线双跳放大转发(AF)中继系统的性能.首先,基于反馈时延波束成形(BF)模型得到混合衰落信道下中继系统的输出等效信噪比(SNR).然后,利用无穷级数展开推导出输出信噪比中断概率(OP)和概率密度函数(PDF)的解析表达式,并进一步得到中继系统遍历容量和平均误符号率(ASER)的理论计算公式.最后,计算机仿真验证了所提出的性能分析方法的正确性,并定量分析了天线数量、反馈时延和信道参数对系统性能的影响.

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