IFM系统的双交叠信号分析及改进

doi:10.3969/j.issn.1009-086x.2021.02.010

现代防御技术 ›› 2021, Vol. 49 ›› Issue (2): 64-71.DOI: 10.3969/j.issn.1009-086x.2021.02.010

• 目标特性与探测跟踪技术 • 上一篇下一篇

IFM系统的双交叠信号分析及改进

王洪迅¹, 王连河², 王建², 王士岩², 王洪雷³

1.空军工程大学航空工程学院,陕西西安 710038;
2.中国人民解放军93286部队,辽宁沈阳 110141;
3.中国人民解放军93149部队,甘肃酒泉 735018

收稿日期:2020-06-07 修回日期:2020-11-09 出版日期:2021-04-20 发布日期:2021-04-30
作者简介:王洪迅(1977-),男,河北吴桥人。副教授,博士,主要研究方向为电子信息系统。通信地址:110041 辽宁省沈阳市于洪区洪湖北街118号 E-mail:57574194@163.com

Analysis of Double Overlapping Signals and Improvement of IFM System

WANG Hong-xun¹, WANG Lian-he², WANG Jian², WANG Shi-yan², WANG Hong-lei³

1. AFEU,Aero & Astronautics Engineering School,Shaanxi Xi’an 710038,China;
2. PLA,No. 93286 Troop,Liaoning Shenyang 110141,China;
3. PLA,No. 93149 Troop,Gansu Jiuquan 735018,China

Received:2020-06-07 Revised:2020-11-09 Online:2021-04-20 Published:2021-04-30

摘要/Abstract

摘要： RWR/ESM系统多采用传统的瞬时测频(instantaneous frequency measure,IFM)技术实时检测信号频率,但这种测频技术对交叠信号只能估计一个信号的频率,且容易产生测频错误。现代战场中电磁环境异常复杂,脉冲交叠概率越来越高,因此研究交叠信号对IFM系统的影响尤显重要。为此根据IFM原理,分析了双交叠信号情况下IFM微波鉴相器的各节点响应,并建立了输出U_I,U_Q的数学模型,提出一种估计双交叠信号频率的算法—U_I,U_Q推算法。仿真结果表明:该算法能够在保持原有IFM优点的情况下,估计2个交叠信号的频率。

关键词: 交叠信号, 频率估计, 顺时测频, 微波鉴相器, 模拟数字转换器

Abstract: RWR (radar-warning receiver)/ESM (electronic warfare support measure) system usually uses traditional instantaneous frequency measure (IFM) technology to detect the frequency of signals in real time,but it can only estimate one frequency when it receives overlapping signals,and easily create frequency measurement errors.But in complex electromagnetic environment of the modern battle,pulses overlapping probability increase.So analyzing the influence of overlapping signals to IFM system is particularly important.Through the basic principle of IFM,analyzed each node response of IFM microwave phase discriminator in the case of double overlapping signals,built mathematical model of output U_I,U_Q and put forward a new algorithm—U_I,U_Q calculation algorithm that can estimate the frequency of double overlapping signals.Simulation results show that the algorithm can estimate the frequency of overlapping signals and keep advantages of original IFM.

Key words: overlapping signals, frequency estimation, instantaneous frequency measure (IFM), microwave phase discriminator, analog to digital converter

中图分类号:

王洪迅, 王连河, 王建, 王士岩, 王洪雷. IFM系统的双交叠信号分析及改进[J]. 现代防御技术, 2021, 49(2): 64-71.

WANG Hong-xun, WANG Lian-he, WANG Jian, WANG Shi-yan, WANG Hong-lei. Analysis of Double Overlapping Signals and Improvement of IFM System[J]. Modern Defense Technology, 2021, 49(2): 64-71.

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IFM系统的双交叠信号分析及改进

Analysis of Double Overlapping Signals and Improvement of IFM System

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