FIR 底通和带通滤波器和IIR 底通和带通滤波器，包含优化类的几个简单示例程序，最小均方误差等算法的MSE的计算。- Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Optimization class contains several simple sample programs, Minimum mean square error MSE calculation algorithm.