语音信号的采集与处理，数字信号处理课设，计算目标和海洋回波的功率谱密度,包括最小二乘法、SVM、神经网络、1_k近邻法。- Acquisition and Processing of the speech signal, digital signal processing class-based, Calculating a target and ocean echo power spectral density, Including the least squares method, the SVM, neural networks, 1 _k neighbor method.