Active cancellation of probing in the presence of multiple coherent desired radar sources

Signals traveling along different paths can be considered coherent with the original source signal if they are delayed and scaled version of the main signal. Coherence is a practical problem faced in beamformers as it leads to signal cancellation. In this paper a weight estimation technique with multiple beam constraints and correlation matrix reconstruction is employed to receive all the coherent/uncorrelated signals from desired radar sources without any loss of information. Simulations are carried out to analyze array efficiency to null all the probing sources and simultaneously receive all the (coherent/ uncorrelated) desired signals. The work reported on multiple signal environments has wide applications in the aerospace engineering.