数字信号处理最有名的三本书,称为数字信号处理圣经,第一本:1Understanding+Digital+Signal+Processing+3rd+E,第二本:2数字信号处理--第四版中文版_john_G.Proakis,第三本:3discrete-time signal processing alan v. oppenheim
A continuous-time signal xa(t) is composed of a linear combination of sinusoidal signals of frequencies 250Hz, 450Hz, 1.0 kHz, 2.75 kHz and 4.05 kHz. The signal xa(t) is sampled at a