ljq_waveform.m

在单一天线接收和发送的UWB中Rake接收机BER的性能的仿真

%/*------------高斯二阶脉冲波形-----------------*/
function [w0]=ljq_waveform(fc,Tm,tau)
%fc是抽样脉冲频率，Tm是冲激响应持续时间，tau脉冲波形形成因子，OVER是产生脉冲的抽样个数，%fc=50e9;tau=0.25e-9;Tm=0.5e-9;
dt=1./fc;
OVER=floor(Tm./dt);
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);