快速衰落信道环境下SRC检测器的性能分析

Performance Analysis of SRC Detector for Fast Fading Distortion Channel

分段拷贝相关器是高斯白噪声背景下,快速衰落水声信道中,对应最大似然比准则的最佳接收机,其输出服从χ2分布。推导出有信号时接收机输出端的概率密度函数和检测概率的解析表达式,计算机仿真结果验证了所获得结果的正确性。最后通过计算无信号时接收机输出的概率密度函数,在给定虚警概率的情况下,求出了接收机的检测门限。

The segmented replica correlation detector is the optimum likelihood ratio test receiver for fast fading distortion channel in white Gaussian noise, whose output of the receiver obeys chi-square distribution. The analytical expressions of the probability density function and detection probability was deduced. The result has been affirmed through computer simulation. Finally, receiver threshold under a certain false alarm probability according to the probability density of receiver output without signal existence was given.