王明骞,贺冲,相东,等. 基于时间调制多波束阵列的单通道全向测向方法[J]. 电波科学学报,2024,39(2):1-9. DOI: 10.12265/j.cjors.2023079
      引用本文: 王明骞,贺冲,相东,等. 基于时间调制多波束阵列的单通道全向测向方法[J]. 电波科学学报,2024,39(2):1-9. DOI: 10.12265/j.cjors.2023079
      WANG M Q, HE C, XIANG D, et al. A full-angle direction finding method with a single channel based on time modulated multi-beam array[J]. Chinese journal of radio science,2024,39(2):1-9. (in Chinese). DOI: 10.12265/j.cjors.2023079
      Citation: WANG M Q, HE C, XIANG D, et al. A full-angle direction finding method with a single channel based on time modulated multi-beam array[J]. Chinese journal of radio science,2024,39(2):1-9. (in Chinese). DOI: 10.12265/j.cjors.2023079

      基于时间调制多波束阵列的单通道全向测向方法

      A full-angle direction finding method with a single channel based on time modulated multi-beam array

      • 摘要: 基于多波束阵列的测向方法具有测向精度高的优势,但各波束都需要独立的射频通道,导致其测向系统复杂且成本高,通道之间的幅相不一致也会增大测向误差。本文提出了一种基于时间调制多波束阵列的单通道全向测向方法,通过时间调制技术将多波束阵列测向系统简化为单通道系统,利用接收信号的谐波特征获得不同波束的接收信号强度实现高精度测向,同时降低了系统的复杂度及成本。仿真结果表明在相同条件下,本文提出的方法比基于多波束阵列的多通道测向方法具有更小的测向误差。经实测验证,本文的方法在4~5 GHz频带内的测向误差小于1.3°,低于现有的多波束阵列测向误差。

         

        Abstract: The direction finding (DF) method based on multi-beam array has the advantage of high accuracy. However, each beam needs an independent radio frequency (RF) channel, which leads to the complexity and high cost of the DF system. The inconsistencies of amplitude and phase between channels will also increase the DF error. A full-angle DF method with a single RF channel based on time modulated multi-beam array is proposed in this paper. The multi-beam array DF system is simplified into a single RF channel system by time modulation. The harmonic characteristic is utilized to calculate the received signal amplitude of each beam to obtain the direction of the arrived signal with high precision, and the complexity and cost of the system are reduced. The simulated results show that the proposed method achieves less error than the multi-channel DF method based on the multi-beam array under same conditions. The measured results show that the DF error of the proposed method is less than 1.3° operating from 4 to 5 GHz, which is smaller than that of the existing multi-beam arrays.

         

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