Digital Signal Processing - IP and Algorithms

[kanava.pitchai]

I am doing my modulations for SDR project in system geneartor 13.1, virtex - 4  xc4vsx25 .

Now i have bulit my ask modulation and demodulation in system generator, there is no problem in modulation part but in demodulation part i have problem in hardware after the filter design in demodulation part.

before rectifier there is no problem in hardware the waveforms are stable, but when i am using the filter design in my project the waveforms are present for sometime and then the waveforms are gone including the digital input.

please help me............

[chrisar]

You will want to look at several points in the design, and try to narrow down which part of the design is failing.  If you don't have any input, then there will be on output on the filter.

Also check the amplitude and frequency of the input.  I may be that the filter is actually doing what is expected and filtering out unwanted signals.

[kanava.pitchai]

ya i think that the problem is after the filter design, are you having any idea to design the filter in system generator for my demodulation.

[kanava.pitchai]

ya i have find the solution for demodulation.