IWR1443: Coherent and non-coherent processing gain summary

A typical FMCW radar signal processing chain includes: range FFT, Doppler FFT, coherent or non coherent integration across the antenna, detection and angle of arrival estimation. The range FFT and Doppler FFT are both coherent processing with both signal amplitude and phase information. So the processing gain is 10*log(N) in dB. Integration across antenna can be coherent or non-coherent. Non-coherent integration losses 1~3 dB gain depending on the number of antenna. Coherent integration across the antennas can be implemented by FFT. Detection can be done after coherent or non-coherent integration.

Please refer to
www.ti.com/.../mmwave-system-estimator

for more system level analysis.