Phase calculation approaches for a multi-tier weak radio signal detection process with N simultaneous signals

This paper reviews the results of a generalized theoretical analysis of Tsui´s phase measurement approach for detection of extremely weak radio signals to the situation in which there are N simultaneous signals, where one signal is strong, and N - 1 signals are weak. Applications to a multi-tier detection process for N = 2, N = 3, and N = 4 simultaneous signals are described. Signal parameters are extracted for the case of N = 2. This work has applications for electronic warfare receivers for detection and characterization of weak signals with unknown parameters.