https://www.alazartech.com/Technology/On-FPGA-FFT?gclid=CjwKCAjw9vn4BRBaEiwAh0muDDDrHZRc2jh0U-7oiRgNrCwsxy4MegoTYicMdiUWWuYVZAQ48ln5FhoCem8QAvD_BwE

https://www.intel.com/content/www/us/en/programmable/products/intellectual-property/ip/dsp/m-ham-fft.html

https://www.xilinx.com/products/intellectual-property/fft.html

Related to your query, I suggest you to look at https://www.youtube.com/watch?v=5QV6n360NIo

https://zipcpu.com/dsp/2018/10/02/fft.html

Conference Paper FFT implementation and optimization on FPGA

you need to understand the maths of FFT/IFFT and the FPGA operating and programming , but I advise you to start with simple equations then move towards the more complex ones

You can use an IP FFT core from Xilinx in Xilinx based FPGAs... read the manual, you have 3 different architectures to implement, each one provide different trade-off between area and FFT transform speed.

Thanks all for ur help. I tried using simulink hdl coder and hdl supported dsp libraries. While trying to generate hdl code, I got errors in configuring valid in and out signals of fft block. Can u ppl help. Thanks

Aparna Sathya Murthy : Thinking to use Altera. Can u share any tutorial on how to configure intel fft ip core for implementing fft and ifft.