I have one following request.
A designer tests the AD-FMCOMMS3-EBZ and AD-FMCOMMS4-EBZ TX performance.
The modeling is similar to LTE system, but with lowest bandwidth.
A test stimulus signal with next plot of band power is applied:
An Internal FIR filter is configured for next graph from MATLAB:
The next out was found, for two different frequencies:
The influence to adjacent channel is too high then -85db,
Without FIR it looks:
What missed ?
What we have to do to achieve suppression equal or better than -65db ?
Do possible it?