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过时信道状态下机会双向中继选择算法

DOI: 10.13190/j.jbupt.2014.06.009, PP. 44-48

Keywords: 协同通信,过时信道状态信息,机会双向中继,中继选择,中断率

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Abstract:

提出了一种针对过时信道状态下机会双向中继系统的第N最优中继选择算法.分析了该算法在过时信道状态下的中断率性能,即通过中继选择时刻信噪比的概率密度函数和以它为条件的数据传输时刻信噪比的条件概率密度函数,确定数据传输时刻信噪比的概率密度函数,给出系统中断率下界的闭式表达及其在高信噪比下的近似值.仿真结果表明,新算法的中断率理论结果同蒙特卡罗仿真结果相重合,且在高信噪比下,其近似表达结果能很好地逼近理论结果.

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