Highly Resolved Synthetic Aperture Radar with Beam Steering
The present work deals with a highly resolved radar with a synthetic aperture (synthetic aperture radar - SAR), which uses a beam steering to improve performance. The first part of this work deals with the influence of various effects occurring in the hardware of the High-Resolution Wide-Swath SAR (HRWS SAR) system. A special focus was set to single bit quantization in multi-channel receiver. The second part of this work describes SAR processors for Sliding Spotlight mode.
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¼¾ according to Eq amplitude analog signal antenna array antenna beam antenna pattern array elements azimuth direction azimuth filter azimuth frequency rad azimuth resolution Band bandwidth baseband calculated according chirp scaling algorithm chirp signal components compressed cut in azimuth cut in range described dimensional phase characteristic ËÆÊÓ exponential function frequency domain geometry HRWS SAR demonstrator illuminated swath independent receive channels input ËÆÊ input signal low bit quantization main lobe minor position errors noise floor noise floor level number of quantization omega-K algorithm parameters phase characteristic cut point target position error presented in Fig Q paths quantization bits quantization noise quantized signal radar antenna radar data radar platform radar signal radar system range and azimuth range direction raw data receive antenna receive signal SAR system satellite slant range sliding spotlight mode spaceborne SAR strip-map mode sub-apertures synthetic aperture radar velocity VKA-representation