cp0203_qpsk1_mod.m

用ofdm方法产生超宽带uwb信号

function [S,Sc,Ss]=cp0203_qpsk_mod(bits)
nb=length(bits);
ns=ceil(nb/2);
b0=zeros(1,ns/2);
b0(1:nb)=bits;
j=sqrt(-1);
for s=1:ns;
    ba=b0(((s-1)*2)+1);
    bb=b0(((s-1)*2)+2);
    k=bb+ba*2;
    p=((pi/4)*(2*k-1))-pi;
    Sc(s)=cos(p);
    Ss(s)=sin9p);
    S(s)=Sc(s)+j*Ss(s);
end