A Novel Synthetic Bandwidth Method for Multi-Baseline Stepped-Frequency SAR

Le résumé fourni par la source

To enhance the application capability of stepped-frequency synthetic aperture radar(SF-SAR) and simplify its system complexity, a multi-baseline architecture for SF-SAR is investigated. We first derive an observation constraint by analyzing the unnoticed impact of Doppler bandwidth differences between sub-band signals on synthesis performance. Building upon this constraint, a novel synthetic bandwidth method, separating the imaging and synthesis processes of sub-band signals, is developed to correct the space-variant slant range differences caused by the distributed baselines and realize two-dimensional high-resolution SAR imaging. Finally, simulations of point targets and real-world scene validate the effectiveness of the proposed method and architecture.

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