t2f.m

产生一个输入的二进制信源 然后进行OOK FSK PSK调制 最后绘出调制后波形及频谱

function[f,sf]=T2F(t,st);

%This is a function ueing the FFT function to calculate a signal's Fourier

%Translation

%Input is the time and the signal vectors,the length of time must greater

%than 2

%Output is the frequency and the signal spectrum

dt=t(2)-t(1);

T=t(end);

df=1/T;

N=length(st);



f=-N/2*df:df:N/2*df-df;

sf=fft(st);

sf=T/N*fftshift(sf);