Time-Modulated Arrays in Scanning Mode Using Wideband Signals for Range-Doppler Estimation With Time-Frequency Filtering and Fusion

被引：11
作者：
Ma, Yue [1 ]
Miao, Chen [1 ]
Long, Weijun [2 ]
Zhang, Ruoyu [1 ]
Chen, Qiaoyu [1 ]
Zhang, Jindong [1 ]
Wu, Wen [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Elect & Opt Engn, Key Lab Near Range RF Sensing ICs & Microsyst NJU, Minist Educ, Nanjing 210094, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Sch Elect & Informat Engn, Nanjing 210044, Peoples R China
来源：
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS | 2024年 / 60卷 / 01期
关键词：
Switches; Radio frequency; Phased arrays; Harmonic analysis; Frequency modulation; Modulation; Estimation; ANTENNA-ARRAYS; AMPLITUDE;
D O I：
10.1109/TAES.2023.3331340
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
Time-modulated array (TMA) has garnered significant interest in recent years as an alternative to phased arrays for certain applications. The TMA offer advantages such as simplicity and high accuracy when employed in scanning mode. However, a significant limitation of TMA is the constrained signal bandwidth, which must be lower than the modulation frequency to avoid aliasing. This constraint can impede progress in wideband range-Doppler (RD) estimation. To address this problem, this article proposes a TMA structure and signal processing method that integrates time, frequency, and time-frequency (TF) domains to extract information for RD estimation. The proposed methods effectively overcome the bandwidth limitation by utilizing TF filtering and data fusion techniques, thereby enhancing the performance of RD estimation in TMA. The simulation results validate the effectiveness of the proposed strategies.
引用
收藏
页码：980 / 990
页数：11
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