Coherent compensation and high‐resolution technology of multi‐band inverse synthetic aperture radar fusion imaging
نویسندگان
چکیده
Multi-band inverse synthetic aperture radar (ISAR) fusion imaging technology can effectively improve the range resolution without incurring high hardware cost. The coherent phase between sub-bands is a prerequisite to achieve multi-band ISAR imaging. Here, joint approach of compensation and high-resolution proposed compensate incoherent obtain images. First, an estimation model based on sparse representation established, accuracy improved by modified dictionary in case off-grid. Then, established. complex Gaussian scale mixture priors are imposed scatterers noise, respectively. solution derived domain variational Bayesian expectation maximization framework. method not only better off-grid, but also high-quality images under low signal-to-noise ratio bandwidth sampling ratio. Experimental results verify effectiveness robustness both numerical simulations real data.
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ژورنال
عنوان ژورنال: Iet Radar Sonar and Navigation
سال: 2021
ISSN: ['1751-8784', '1751-8792']
DOI: https://doi.org/10.1049/rsn2.12030