利用信号自相关法，对给定参数的，夹杂高斯白噪声的随机信号进行检测。通过观察自相关函数图形来分析接受的随机信号中是否有余弦信号存在。-Autocorrelation method using the signal for a given parameter, mixed Gaussian white noise random signal is detected. By observing the autocorrelation function graph to analyze random signal received if there exists a cosine signal.