matlab 数字升余弦仿真

clear all; close all; fd=1e3; fs=fd*10; delay=5; %分别求四种情况下的升余弦函数 num1=rcosine(fd,fs,'fir/normal',0,delay); num2=rcosine(fd,fs,'fir/normal',0.5,delay); num3=rcosine(fd,fs,'fir/normal',0.75,delay); num4=rcosine(fd,fs,'fir/normal',1,delay); %分别求四种情况下的升余弦函数的幅度响应 Hwa=abs(fft(num1,1000)); Hwb=abs(fft(num2,1000)); Hwc=abs(fft(num3,1000)); Hwd=abs(fft(num4,1000)); angH1=angle(fft(num1,1000)); angH2=angle(fft(num2,1000)); angH3=angle(fft(num3,1000)); angH4=angle(fft(num4,1000)); t=0:1/fs:1/fs*(length(num1)-1); %分别画出四种情况下的升余弦对应的时域波形 figure(1);