On the use of the global matched filter for DOA estimation in the presence of correlated waveforms

The correlation between waveforms arriving at an array of sensors, which is generally a consequence of multipath propagation, can drastically degrade the performance of source localization and detection schemes. Most approaches proposed so far to handle this difficulty, consist in performing some preprocessing aiming to decorrelate the signals and have limited effects. They are moreover restricted to specific array geometries. We present a technique that works for any geometry and that is able to handle coherent signals as well. It simply relies on no prior assumption on spatial stationarity.