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ok... cos now after passing through the FFT core, the output of FFT is like the d_in i showed... i want to find the peak value and its location... yes the peak value can be found but the location shown is not correct as it's not counted from the first valid output of the FFT core... and also i want to find several peaks to find what frequencies have been inputted... if you don't know how to do it, then never mind... thanks for your replies...
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you don't need to push fft output forward. All you need is check the fft frame when ready for peaks. The location of peak need to be adjusted for latency issues so you need to check that in simulation.
For multiple peaks you shouldn't use max value, instead you need to define an absolute threshold to define your peaks then check fft output against that threshold, save peaks accordingly.
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