OPTIMAL MONOPULSE TRACKING OF SIGNAL SOURCE OF UNKNOWN AMPLITUDE (ThuAmOR5)

Author(s) : Eric Chaumette (thales naval france, France) Pascal Larzabal (SATIE/CNRS ENS cachan, France)

Abstract : Estimation of the direction of arrival of a signal source by means of a monopulse antenna is one of the oldest and most widely used high resolution techniques [1]. Although the statistical performance of this estimation technique has been extensively investigated for decades, recent work [2] based on an analysis of the problem from the point of view of optimal detection applied to a two-sensors system, has shown that the common solution (detector/estimator) restricts the accessible performance. Indeed, changing the detector is necessary to optimize the overall performance. First derived in the particular case of Rayleigh-type signal source, this approach can be extended to the case of a signal source of unknown amplitude (including the non fluctuating case). The present paper establishes analytical performance of both new and common solutions in that case.

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