cp02011.m

uwb的信号产生以及几种调制方法

fc=10e10;
Tm=0.9e-9;
tau=0.2e-9;
dt = 1 / fc;            % reference sampling period
OVER = floor(Tm/dt);    % number of samples representing
                        %  the pulse

e = mod(OVER,2);
kbk = floor(OVER/2);
tmp = linspace(dt,Tm/2,kbk);
s = (1-4.*pi.*((tmp./tau).^2)).* ...
     exp(-2.*pi.*((tmp./tau).^2));
 if e                % OVER is odd
    for k=1:length(s)
        y(kbk+1)=1;
        y(kbk+1+k)=s(k);
        y(kbk+1-k)=s(k);
    end
else                % OVER is even
    for k=1:length(s)
        y(kbk+k)=s(k);
        y(kbk+1-k)=s(k);
    end
end

E = sum((y.^2).*dt);     % pulse energy
w0 = y ./ (E^0.5);       % energy normalization

 time=linspace(-Tm/2,Tm/2,length(s));
p=plot(time,s);
grid on ;