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Hi,
I have a general question in the range FFT calculation. When we use complex 1x format, each raw ADC sample at each receiver will be a complex number. Therefore, the range FFT can be applied in the following ways:
1 - Use complex ADC samples as time series input to FFT to get the frequency response, which gives the range bins.
2 - Calculate the magnitude of each complex ADC sample first. Then feed these real time series data input to FFT to get the range bins.
3 - Use the real or the imaginary component of each complex ADC sample and feed these real values to FFT to get the range bins. (I presume choosing between real and imaginary component would not make a big difference in this option)
My question is does any of the above methods provide advantage compared to others or can I choose any of them? My incline is towards using method 2, but I want to make sure this is not going to have a significant detection performance penalty.
Thank you for your help.
Regards,
Cagri
