I am trying to implement digital up/down converter in which the
implementation flow is
DUC
Interpolation->Digital mixer
DDC
Digital mixer->Decimation
In (DUC)digital mixer the input is I AND Q symbols then same I,Q are
recovered at (DDC)digital mixer
I want to find out complete equations of Mixer so that i can easily
implement it
According to my understanding in DUC digital mixer the equation is
Transmit_signal=I*Cos(wt)-Qsin(wt);
And in the receiver side the I and Q is recovered through following
sequence
Reciver_I=Transmit_signal*Cos(wt);
Reciver_Q=Transmit_signal*sin(wt);
Reciver_I_fil=lowpassfilter(Reciver_I);
Reciver_Q_fil=lowpassfilter(Reciver_Q);
but i cannot be able to recover the exact I and Q symobls at the
receiver side please help to find the exact equations