ljq_transmitter_2ppm_th.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

%PPM-TH-UWB信号发射
%------------------by LinJiaqing---------------------------
function [THcode,Stx,ref]=ljq_transmitter_2PPM_TH(pow,fc,numbits,Ts,Ns,Np,Tc,Nh,Tm,tau,dPPM,G,bits)
%------------------------重复码编码---------------------
  numbits=length(bits);
  temprect=ones(1,Ns);
  temp1=zeros(1,numbits*Ns);
  temp1(1:Ns:1+Ns*(numbits-1))=bits;
  temp2=conv(temp1,temprect);
  repbits=temp2(1:Ns*numbits);
%---------------------------TH编码------------------------
 THcode=floor(rand(1,Np).*Nh);
%-----------------------------PPM和TH-----------------------
[PPMTHseq,THseq]=ljq_2PPM_TH(repbits,fc,Tc,Ts,dPPM,THcode);
%------------------------脉冲形成-----------------------------
power=(10^(pow/10))/1000;
Ex=power*Ts;
w0=ljq_waveform(fc,Tm,tau);
wtx=w0.*sqrt(Ex);
Sa=conv(PPMTHseq,wtx);
Sb=conv(THseq,wtx);
L=(floor(Ts*fc))*Ns*numbits;
Stx=Sa(1:L);
ref=Sb(1:L);