Abstract

Imagery that are obtained by non-coherent radar sensors suffer from a multitude of quality degradations among which antenna induced poor angular resolution is one of the most troublesome. We present a new approach to beam sharpening that improves the apparent resolution of the radar sensor several times depending on the signal-to-noise ratio. The technique consists of a compensating filter whose coefficients are obtained by minimizing the expected quadratic estimation error. This nonlinear filter is then applied on sets of real 35 GHz non-coherent radar imagery and its performance is demonstrated. Results of the implementation of the technique on real-time digital signal processing (DSP) hardware are also provided.

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