语音信号的采集与处理，数字信号处理课设，有信道编码，调制，信道估计等，二维声子晶体FDTD方法计算禁带宽度的例子。- Acquisition and Processing of the speech signal, digital signal processing class-based, Channel coding, modulation, channel estimation, Dimensional phononic crystals FDTD method calculation e