pinyu.m

就是qpsk用matlab实现调制解调以及扩频接扩

function S1=pinyu(S,fs)
S1=fft(S,1024); %求出原始信号的傅立叶变换
w=(0:511)/512*(fs/4);
figure(20)
plot(w,abs(S1(1:512)'));
title(' 滤波前' );
set(gcf,'color' ,'white' );
xlabel(' Frequency(Hz)' );
ylabel(' Mag.of frequency response' ); grid;
end