Performance Analyses of Amplitude-Comparison Direction-Finding Under Cooperative Coherent Dual Sources

WANG Bing; YANG Yi-chuan; DING Huai; XIA Bi-jun; ZHU Lei; DENG Ming-long

doi:10.12263/DZXB.20240474

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Performance Analyses of Amplitude-Comparison Direction-Finding Under Cooperative Coherent Dual Sources

Electromagnetic Spectrum and Unmanned Technology | 更新时间：2025-08-18

- Performance Analyses of Amplitude-Comparison Direction-Finding Under Cooperative Coherent Dual Sources
- ACTA ELECTRONICA SINICA Vol. 53, Issue 5, Pages: 1379-1389(2025)
- 作者机构：
  
  电磁空间安全全国重点实验室，四川成都 610036
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20240474
  CLC： TN958;
- Received：23 May 2024，
  
  Revised：2025-01-12，
  
  Published：25 May 2025
- 稿件说明：
移动端阅览
汪兵, 杨益川, 丁怀, 等. 协同相干两点源比幅测角性能分析[J]. 电子学报, 2025, 53(05): 1379-1389.

WANG Bing, YANG Yi-chuan, DING Huai, et al. Performance Analyses of Amplitude-Comparison Direction-Finding Under Cooperative Coherent Dual Sources[J]. Acta Electronica Sinica, 2025, 53(05): 1379-1389.
汪兵, 杨益川, 丁怀, 等. 协同相干两点源比幅测角性能分析[J]. 电子学报, 2025, 53(05): 1379-1389. DOI：10.12263/DZXB.20240474

WANG Bing, YANG Yi-chuan, DING Huai, et al. Performance Analyses of Amplitude-Comparison Direction-Finding Under Cooperative Coherent Dual Sources[J]. Acta Electronica Sinica, 2025, 53(05): 1379-1389. DOI：10.12263/DZXB.20240474

摘要

针对协同相干多/两点源场景下比幅单脉冲测角的性能分析问题，本文在两点源比幅测角一般模型基础上给出了相干两点源的比幅测角表达式，并分析了3种典型情况；然后，推导了比幅测角误差与同步相位差误差和系统误差的理论关系，并给出了测角误差的准确度模型；最后，通过数字仿真实验给出了两点源信号的同步相位差、功率比、信号角度等因素对比幅测角结果、测角误差及其准确度的影响.结果表明：比幅测角结果受相干两点源同步相位、功率比等因素的影响较大，测角结果可能位于两信号角度之间也可能位于两信号角度之外；系统和信号的误差越小，测角误差模型越准确；信号工作频率越高，对时间同步要求越高.本文完善了两点源场景下比幅测角理论，为测角性能分析、测角系统方案优化等提供理论依据.

Abstract

This paper focuses on the problem of the amplitude-comparison direction-finding (DF) system of the monopulse radar under the scene of cooperative coherent dual sources. The authors describe the general model of the amplitude-comparison DF system and analyze three typical cases. And then

the theoretical errors and their accuracies of the estimated angle

which are caused by the system errors and the synchronous phase difference error

are derived. Finally

the numerical simulations are provided to analyze the influences of the signals’ parameters to the estimated angle

including the synchronous phase difference

the power ratio and the signals’ angles. The errors of estimated angle and their accuracies are also provided. The results illuminate that the estimated angle is between the angles of the dual sources

the smaller the errors the more accurate the error models of the estimated angle and the higher the working frequency the more rigorous the time synchronous demand. This paper can fill up some gaps of the DF theory under the condition of dual sources and also provide some guidance for the performance analyses and the optimizations of the scheme for the DF system.

关键词

Keywords

references

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