Capon- and APES-based SAR processing: performance and practical considerations
PublisherIEEE Press. Institute of Electrical and Electronics Engineers
Rights accessOpen Access
This paper discusses the use of Capon’s minimumvariance method (MVM) and Amplitude and Phase EStimation (APES) spectral-estimation algorithms to synthetic aperture radar range–azimuth focusing. The rationale of the algorithms is discussed. An implementation of a Capon or APES processing chain is explained, and processing parameters such as chip-image size, resampling factor, and diagonal loading are discussed. For multichannel cases, a joint-processing approach is presented. A set of Monte Carlo simulations are described and used to benchmark Capon- and APES-based processing against conventional matched-filter-based approaches. Both methods improve the resolution and reduce sidelobes. APES yields generally better estimates of amplitude and phase than Capon but with worse resolution. Results with RADARSAT-2 quad-polarization data over Barcelona are used to qualitatively study the real-life performance of these algorithms.
CitationLopez, F.; Mallorqui, J.J. Capon- and APES-based SAR processing: performance and practical considerations. "IEEE transactions on geoscience and remote sensing", Maig 2010, vol. 48, núm. 5, p. 2388-2402.