对matlab的小波函数进行了一下总结，希望对大家有帮助。-For matlab wavelet functions were to sum up, we want to help.

给出两个chirp信号相加后，由瞬时频率定义求出的瞬时频率曲线，说明瞬时频率的不确切性；-The sum of two chirp signals are given, after the definition of instantaneous frequency derived from the instantaneous frequency curve, indicating lack of precision in the instantaneous frequency

对信号f(x)进行三层小波变换，得到小波系数d1,d2,d3和逼近系数a3，我想求出各个频率段的能量（能量=小波系数的平方和），很不错的应用程序-The signal f (x) for three wavelet transform, wavelet coefficients d1, d2, d3 and approximation coefficients a3, I would like to find the energy of each frequency band (energy =

圆周阵波束形成，时延求和与等效不均匀线阵形成-Circumferential array beamforming, the the delay sum equivalent non-uniform linear array formed