Title :
Enhancing angular resolution in non-coherent radar imagery
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
Keywords :
image enhancement; image resolution; nonlinear filters; radar imaging; 35 GHz; DSP hardware; MM wave radar; angular resolution enhancement; beam sharpening; compensating filter; image enhancement; non-coherent radar imagery; nonlinear filter; quadratic estimation error; radar sensors; real-time digital signal processing; signal-to-noise ratio; Degradation; Digital signal processing; Estimation error; Filters; Image resolution; Image sensors; Radar antennas; Radar imaging; Signal resolution; Signal to noise ratio;
Conference_Titel :
Radar, 1996. Proceedings., CIE International Conference of
Conference_Location :
Beijing
Print_ISBN :
0-7803-2914-7
DOI :
10.1109/ICR.1996.574454
