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多径衰落信道中基于自适应MCMC的调制识别

DOI: 10.13190/j.jbupt.2014.01.007, PP. 31-34

Keywords: 调制识别,多径衰落,自适应Metropolis,马尔可夫链蒙特卡洛

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Abstract:

针对多径衰落信道中幅相调制信号的类型识别问题,提出了一种基于自适应马尔可夫链蒙特卡洛(MCMC)——自适应Metropolis的改进算法.该算法利用Markov链的历史信息自动调整建议分布函数的协方差矩阵,使其不断地逼近目标分布,从而避免了传统Metropolis算法中建议分布函数选取这一难题,并能有效地提高采样效率.仿真实验表明,算法具有很好的识别精度,证明了算法的有效性.

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