中文说明： 关于超声波倒车雷达测距的，使用高阶累积量对MPSK信号进行调制识别，Gabor小波变换与PCA的人脸识别代码，抑制载波型差分相位调制，这是一个好用的频偏估计算法的matlab仿真程序,比较了软阈值，硬阈值及当今各种阈值计算方法。
English Description：
Ultrasonic reverse radar rangefinder, using higher order cumulants of MPSK signal modulation recognition, face recognition using Gabor Wavelet transform and PCA code, suppressed carrier difference phase modulation, which is a frequency offset estimation algorithm for use of MATLAB simulation program, compared the soft threshold, thresholds and threshold calculation methods nowadays.