离散时间信号与系统 ,离散傅里叶变换及其快速算法,无限长单位脉冲响应(IIR)滤波器的设计方法,有限长单位脉冲响应(FIR)滤波器的设计方法 ,数字信号处理系统的实现-Discrete-time signals and systems, discrete Fourier transform and its fast algorithm, infinite impulse response (IIR) filter design methods, finite impulse response (FIR) filter design methods, digital signal processing system implementation