在闭启键控通信系统中，两个假设下的观察信号模型为：



若两个假设的先验概率相等，且 , ,采用最小平均错误概率准则，试确定判决表达式，并求最小平均错误概率，利用MATLAB软件比较其理论值、仿真值。上述情况中，噪声 是均值为 ，方差为 的高斯噪声，仿真信噪比范围： ，间隔为 。

-In the closed Kai keying communication systems, the observed signal model under two assumptions: equal to the a priori probability of two assumptions, and the minimum average error probability criterion, and try to determine the verdict expression and find the minimum average error probability, using MATLAB software to compare the theoretical value, the simulation values. The above case, the noise is the mean and variance of the Gaussian noise, simulation the SNR ranges: interval.