To do accurate amplitude measurements on an digital radar receiver, I am searching for the best method to get the amplitude out of a FFT. The signal is windowed using a Blackman window.
So far I'm only looking for the best way to reduce scalloping loss. I'm already in the frequency domain and want to find the real peak of the FFT spectrum. I already tried parabolic interpolation, but this gives errors if the signal is near the noise level.
What is the best way to reduce scalloping loss errors without using a flattop window?