FFT of time domain data

[verylsi]

I am trying to do FFT of time domain data in FPGA (VHDL)
looking for documentation, resources and start up hints.. and little guidance in how to proceed.

Please help.

 

[achaleus]

What is your N(sample) value, if it is variable, first go through CORDIC algorithm to generate sine and cosine values, go through FFT algorithm from dspguru.com.. and any text book related to DSP.. Develop your own architecture and start coding..(Start on paper calculation of fft with N=8,N=16.. you will get to know the logic)

all the best

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https://github.com/benreynwar/fft-dit-fpga once check it out, it may be helpful

 

[syedshan]

Hi

If your main target is to make an FFT block in actaul, then you have to do as achaleus says, but if your main task is something bigger and FFT is just a part of it, and you are using Xilinx then Xilinx core generator will generate the FFT block for you.
It is much easier than doing things yourself and is reliable as well.

 

[verylsi]

Thanks achaleus,

Yes the samples are variable..

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Hi syeshan,

Main target is Software defined radio.
I need FFT implementation , I will check the IP core as you mentioned.

Thanks.