demodulation.m

来自「8状态8PSK TCM系统（频带＋噪声）」· M 代码 · 共 36 行

function Code_in_bit=Demodulation(y,seg,t);

fc=2;
Ts=1;
dt=1/32;
Local1=cos(2*pi*fc.*t);
Local2=sin(2*pi*fc.*t);
cycle0=t/dt;
global I;
global Q;
I(cycle0)=Local1*real(y);
Q(cycle0)=Local1*imag(y);

if(t==(seg+2)*Ts)
	for cycle1=1:(seg+2),
    		integral_I(cycle1)=0;
    		integral_Q(cycle1)=0;
   		for cycle3=(cycle1-1)/dt+1:cycle1/dt,
			integral_I(cycle1)=integral_I(cycle1)+I(cycle3);
			integral_Q(cycle1)=integral_Q(cycle1)+Q(cycle3);
		end
		yy(cycle1)=2*dt*integral_I(cycle1)+j*2*dt*integral_Q(cycle1);
    	end
	yy;
	Code_in_bit=Receive(yy);
else
	Code_in_bit=[0];
end




%for t=dt:dt:(seg+2)*Ts,