truwbrx.m

UWB Sourece. transmit/receive /AWGN/BER

% TR-UWB Receiver
% Author: Caglar Arslan
% Date: 03-10-2007
%--------------------------------------------------------------------------
function [receivedData] = TRUWBRX(allPulsesWithNoise,numberOfBits,Tf,Nf,Td,fs,plotFlag);

% Sync Parameters
% Tf,Nf,Td

% Simulation Parameters
% fs,numberOfBits

Ts=Nf*Tf;

receivedSignal=allPulsesWithNoise;

%Delay the signal
signalLength=length(allPulsesWithNoise);
simulationDelay= Td*1e-9*fs;
receivedDelayedLength=signalLength+simulationDelay;
receivedSignalWithDelay=zeros(1,receivedDelayedLength);

receivedSignalWithDelay(1,simulationDelay+1:length(receivedSignalWithDelay))=allPulsesWithNoise;

if plotFlag==1
    figure
    tnew  = 0 : 1/fs : numberOfBits*Ts*1e-9 + Td*1e-9;
    plot(tnew,receivedSignalWithDelay)
end

%Multiply the received signal with the delayed version of it.
normalizedReceivedSignal=zeros(1,receivedDelayedLength);
normalizedReceivedSignal(1,1:length(receivedSignal))=receivedSignal;
crossMultipOfReceived=normalizedReceivedSignal.*receivedSignalWithDelay;

%Integration (Correlation) Integration Window = Ts*i to Ts*i+1 ,
%i=0,1,2,3....numberOfBits*Nf
%For the numerical integration, trapezoidal numeric integration method is
%used
iW=Ts*1e-9*fs; %The integration window length
for i=1:numberOfBits
    res=trapz(crossMultipOfReceived( (iW*(i-1))+1 :iW*i));
    if res>0
        receivedData(i)=1;
    else
        receivedData(i)=-1;
    end
end