电波科学学报2025，Vol.40Issue(1)：132-140,9.DOI:10.12265/j.cjors.2024028
基于对称卷积的镜像综合孔径无混叠视场研究
The aliase-free field of view of mirrored aperture synthesis based on symmetric convolution
摘要
Abstract
The aliase-free field of view directly determines the field of view range that can be observed by the aperture synthesis,which is of great significance for improving the quality of brightness temperature images of mirrored aperture synthesis within the observation field.Therefore,based on the discrete cosine transform(DCT)domain convolution theorem,this article derives the array factor of the mirrored aperture synthesis and obtains that the aliase-free field of view of the mirrored aperture synthesis is half of that of the aperture synthesis.In addition,the reconstructed brightness temperature image of the mirrored aperture synthesis can be represented as the product of the extended scene and the extended array factor.Then,the theoretical correctness of the aliase-free field of view for one-dimensional and two-dimensional mirrored aperture synthesis is verified using the simulations and existing mirrored aperture synthesis experimental systems.The research method in this paper can provide reference for improving the quality of brightness temperature images for mirrored aperture synthesis.关键词
镜像综合孔径/综合孔径/离散余弦变换(DCT)域卷积定理/对称延拓/亮温图像重建Key words
mirrored aperture synthesis/aperture synthesis/discrete cosine transform(DCT)domain convolution theorem/symmetric extension/brightness temperature image reconstruction分类
信息技术与安全科学引用本文复制引用
李育芳,朱四华,尹肖云,陈晔,刘丹丹..基于对称卷积的镜像综合孔径无混叠视场研究[J].电波科学学报,2025,40(1):132-140,9.基金项目
国家自然科学基金(42205139) （42205139）
