I have two sets of data (V1 and V2), each is an array of 4096 by 512 complex voltages (raw). I have already applied windowing, range processing and doppler processing leading to the generation of the range-Doppler map.
Now I wish to calculate the cross spectrum V12 using V1 and V2. Where should I start? Can I use the equation below? And if I were to use the said equation, do the parameters FFT(B) and FFT(A) correspond to the ouput of my Doppler processing? What does N^2 mean?