On Baseline Weighting for Radiometric Sensitivity Analysis in Microwave Interferometric Radiometry

被引：8

作者：

Zhu, Dong ^{[1
]}

Hu, Fei ^{[1
]}

Peng, Xiaohui ^{[1
]}

Lu, Hailiang ^{[2
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Elect Informat & Commun, Wuhan 430074, Hubei, Peoples R China

[2] China Acad Space Technol, Xian 710100, Shaanxi, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2019年 / 18卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Baseline; interferometric aperture synthesis radiometer (IASR); microwave radiometry; radiometric sensitivity; thinned antenna arrays; weighting; ANGULAR RESOLUTION; ARRAYS; OPTIMIZATION; SMOS;

D O I：

10.1109/LAWP.2019.2903315

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter presents a study on the effects of baseline weighting on the performance of radiometric sensitivity in interferometric aperture synthesis radiometers (IASRs). After a brief review on the computation of radiometric sensitivity, its theoretical lower bound, associated with the concept of coherent gain, is derived. We also draw attention to the performance tradeoffs between radiometric sensitivity and several spatial-domain properties of IASRs from which different weightings can be compared. Numerical examples are given to demonstrate the significance of the comparative analysis.

引用

页码：791 / 795

页数：5

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