中国舰船研究2024，Vol.19Issue(4)：282-289,8.DOI:10.19693/j.issn.1673-3185.03367
基于非均匀时间调制的单通道比幅测向方法
Single-channel amplitude-comparison wideband direction finding method with nonuniform time modulation
摘要
Abstract
[Objective]To overcome the problem of the limitation of working bandwidth due to the phase ambiguity caused by the carrier frequency's variation in conventional time-modulated direction finding,a single-channel direction finding method with nonuniform time modulation is proposed in this paper.[Methods]By modulating the signals received by different antenna elements at the same time with nonuni-form periods,the amplitude information can be separately mapped to the corresponding modulated frequency without aliasing.With the amplitude ratio independently extracted from the harmonics,single-channel direc-tion finding for the incident signal can be achieved using the lookup table method.[Results]The feasibility of the proposed method is verified on the basis of the numerical simulation results.Meanwhile,a wideband non-uniform time modulation system available for 2.4 GHz and 5.8 GHz is constructed and its effectiveness demonstrated,with the results showing that the mean of direction finding absolute error is 0.21° and 0.18° re-spectively.[Conclusions]The proposed method can effectively improve the working bandwidth and has such advantages as a simple structure,low cost,low signal processing complexity and wideband direction finding.关键词
时间调制/宽带测向/幅度比较/单通道/非均匀调制Key words
time modulation/wideband direction finding/amplitude comparison/single channel/nonuni-form modulation分类
交通工程引用本文复制引用
卞大鹏,赵晓楠,刘振吉,陈靖峰,金荣洪..基于非均匀时间调制的单通道比幅测向方法[J].中国舰船研究,2024,19(4):282-289,8.基金项目
国家自然科学基金资助项目(62001291) （62001291）
上海市"科技创新行动计划"高新技术领域资助项目(20511106600) （20511106600）
上海交通大学—西安电子科技大学教育部重点实验室联合基金资助项目(LHJJ/2021-09) （LHJJ/2021-09）
