中文说明：实现串口的数据采集，信号处理中的旋转不变子空间法，基于matlab平台实现,STM32制作的MP3的全部资料，包括 MUSIC算法，ESPRIT算法 ROOT-MUSIC算法，构成不同频率的调制信号。
English Description：
Realization of serial data acquisition, signal processing in rotation invariant subspace method, based on MATLAB platform, making the STM32 MP3 all the information, including music algorithm, ESPRIT algorithm Root-MUSIC algorithm, constitute modulation signals of different frequencies.