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DSP and RF simulation

Question asked by patricio on Aug 15, 2011
i'm trying to simulate a digital transmiter combining a DSP with RF. I generate a banpass pass signal
my simulation use a FIR filter to filter a bandpass signal (FI) and then a upconverter mixer to translate from IF to RF. I use Matlab to filter the data and store the results in .tim file. Then a use the timeddataread to read the generate file in ADS. when a pass the signal in the mixer i d'ont get nothing, just zeros.
Somebody please help me.