通过M 函数的编写，进行软件仿真，得出了相应的波形与频谱,噪声曲线等.该结果可以弥补硬件设备中由于干扰引起的误差，且较之以往采用的simulink 工具箱进行的同类处理，具有参数设置少、函数易于保存，方便其他程序调用、操作更为快捷直观等优点。-M function by writing, software simulation, draw the corresponding waveform and spectrum, noise curve, etc. The results of similar processing hardware can compensate errors due to interference caused by the device, and compared with previously used simulink toolbox of with fewer parameters, functions easy to store, easy to call other procedures, the operation more efficient and intuitive advantages.