Complex phase error and motion estimation in synthetic aperture radar imaging

Mehrdad Soumekh; H. Yang

doi:10.1117/12.45375

1 June 1991 Complex phase error and motion estimation in synthetic aperture radar imaging

Mehrdad Soumekh, H. Yang

Proceedings Volume 1452, Image Processing Algorithms and Techniques II; (1991) https://doi.org/10.1117/12.45375
Event: Electronic Imaging '91, 1991, San Jose, CA, United States

Abstract

Attention is given to a SAR wave equation-based system model that accurately represents the interaction of the impinging radar signal with the target to be imaged. The model is used to estimate the complex phase error across the synthesized aperture from the measured corrupted SAR data by combining the two wave equation models governing the collected SAR data at two temporal frequencies of the radar signal. The SAR system model shows that the motion of an object in a static scene results in coupled Doppler shifts in both the temporal frequency domain and the spatial frequency domain of the synthetic aperture. The velocity of the moving object is estimated through these two Doppler shifts. It is shown that once the dynamic target's velocity is known, its reconstruction can be formulated via a squint-mode SAR geometry with parameters that depend upon the dynamic target's velocity.

Citation Download Citation

Mehrdad Soumekh and H. Yang "Complex phase error and motion estimation in synthetic aperture radar imaging", Proc. SPIE 1452, Image Processing Algorithms and Techniques II, (1 June 1991); https://doi.org/10.1117/12.45375

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