基于人工神经网络的常用数字信号调制，实现用SDRAM运行nios，同时用SRAM保存摄像头数据，信号处理中的旋转不变子空间法。- The commonly used digital signal modulation based on artificial neural network, Implemented with SDRAM run nios, while saving camera data SRAM, Signal Processing ESPRIT method.