pinyu.asv

就是qpsk用matlab实现调制解调以及扩频接扩

function FF=pinyu(S)
S=fft(s,1024); %求出原始信号的傅立叶变换
w=(0:1023)/1024*(Fs/2);
subplot(224);
plot(w,abs([S(1:256)' ,SF(1:256)' ]));
title(' 滤波前、后的幅频图' );
set(gcf,'color' ,'white' );
xlabel(' Frequency(Hz)' );
ylabel(' Mag.of frequency response' ); grid;
legend({' 滤波前的幅频' })
end