摘要
在采样数据量受限情况下,提出了一种计算数字PAM信号的高阶统计量分布范围的方法,用以确定采样信号统计量参数的范围,并计算出参数在该范围中出现的概率。该方法首先推导了统计量参数与各码元个数、幅度之间的关系,然后利用码元个数出现的概率分布特征计算出统计量参数的分布范围。最后根据这种算法以中频数字PAM信号为对象进行仿真计算,得出了一定码元数的4PAM,8PAM,16QAM信号的规一化峰度的分布范围,并从概率角度对数字PAM信号的非高斯分类进行了补充。
To calculate distributing range of Higher-Order Statistics(HOS)of Digital PAM,An method which is on condition of restricted sample- data is proposed.This method is used to figure out range of HOS and its distribution.First,the relationship between HOS and numbers of each code and its amplitude is reckoned.Then,range of HOS is worked out through the distribution of numbers of each code.Last,Using the Digital PAM of intermediate frequency as object of simulation, range of normal kurtosis of 4PAM,8PAM and 16QAM is given out and classification of non-gauss signal is reinforced from probability plont of view.
出处
《电子技术（上海）》
2008年第4期70-73,共4页
Electronic Technology
