dqpskdecoder.m

simulation module for visual wireless sensor network

function [BitStreamOne,BitStreamTwo] = DQPSKDecoder(I_SymbolsRx,Q_SymbolsRx)

streamLength = length(I_SymbolsRx);
ModAngles = angle(I_SymbolsRx + j*Q_SymbolsRx);
DiffAngles = [ModAngles 0] - [0 ModAngles];
DiffAngles = DiffAngles(1:end-1);
BitStreamOne = zeros(1,streamLength);
BitStreamTwo = zeros(1,streamLength);
for i=1:streamLength,
   BitVector = InvPhaseMap(DiffAngles(i));
   BitStreamOne(i) = BitVector(1);
   BitStreamTwo(i) = BitVector(2);
end