基于卡方检验的莱斯信道统计特性可信性评估

摘要

为有效地对莱斯衰落信道模型统计特性进行验证, 提出一种基于卡方拟合优度检验的莱斯衰落信道统计特性可信性评估方法.建立莱斯衰落信道统计特性可信性评估的假设检验模型, 根据莱斯信道衰落模型构造信道复输出序列, 计算提取其幅度包络序列概率密度分布函数序列, 引入卡方拟合优度检验, 比较幅度包络序列概率密度分布与零假设下特定概率分布是否一致.计算机仿真结果表明, 该方法有效可行, 其性能受信道关键仿真参数影响较小.%To validate the statistical characteristics of the Rice fading channel model, a method for evaluating the credibility of the Rice fading channel statistical characteristics based on the chi-square goodness-of-fit test was proposed.A hypothesis test model for credibility evaluation of the statistical characteristics of Rice fading channel was established.The channel complex output sequence was constructed according to the Rice channel fading model, and the probability density function sequence of amplitude envelope sequence was extracted.By computing the empirical cumulative distribution function of the amplitude envelope sequence and comparing it with the specific cumulative distribution function of amplitude envelope sequence under null hypothesis, the chisquare goodness-of-fit test was performed.Computer simulation results show that the proposed method is effective and feasible, and its performance is less affected by the key simulation parameters of the channel.