Improved jammer localization using multiple focusing
Edgar F. Velez, Moeness G. Amin · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1990
Focusing techniques have proven efficient in direction-of-arrival estimation of broadband signals. However, when used alone at high frequency operation, these techniques cannot accurately locate the sources, due to the numerous spurious peaks in the spectrum. Since the spurious peaks depend on the array manifold, their location varies from one focusing frequency to another. Improved jammer localization can, therefore, be achieved by focusing at different frequencies and then averaging the corresponding MUSIC spectra. The averaging smooths out the undesired peaks while boosting the common spectral peaks, allowing correct detection and location of the waveforms impinging on the array.