分别用Pisarenko谐波估计法、MUSIC算法和ESPRIT算法对三正弦叠加高斯白噪声信号源进行频率估计，附件中有代码说明，编译环境为matlab。-Respectively Pisarenko harmonic estimation, MUSIC algorithm and the ESPRIT algorithm superimposed on the three sine Gaussian white noise signal source for frequency estimati

02 正弦信号的叠加合成；合成f 50Hz，幅值为3的方波- 02 sine signal synthesis Synthesis of f 50 hz, square wave amplitude is 3