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兵工学报 ›› 2013, Vol. 34 ›› Issue (12): 1506-1513.doi: 10.3969/j.issn.1000-1093.2013.12.004

• 论文 • 上一篇    下一篇

捷变频雷达信号分选及基准频率估计算法研究

杨健, 刘渝, 狄慧   

  1. (南京航空航天大学 电子信息工程学院, 江苏 南京 210016)
  • 收稿日期:2012-11-08 修回日期:2012-11-08 上线日期:2014-03-04
  • 作者简介:杨健(1986—),男,博士研究生
  • 基金资助:
    国家自然科学基金项目(61201208);江苏省高校优势学科建设工程项目(2011年); 南京航空航天大学基本科研业务费专项科研项目(NN2012068)

Research on the Algorithm of Signal Sorting and Reference Frequency Estimation of Frequency Agility Radar

YANG Jian, LIU Yu, DI Hui   

  1. (College of Electronics and Information Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016, Jiangsu, China)
  • Received:2012-11-08 Revised:2012-11-08 Online:2014-03-04

摘要: 现代雷达普遍采用频率捷变方式,传统的信号分选算法往往会造成增批问题。对接收到的信号进行高精度频率估计,利用相邻2个信号频率差相除,在一定的搜索范围内,通过比较相除结果的小数部分,来分选出不同雷达信号。根据分选出的来自同一部雷达信号,用相同方法可估计出信号的分频系数,从而估计出雷达的基准频率。仿真结果表明:该算法可有效地分选捷变频雷达信号,抑制增批问题的产生,可对特定辐射源进行准确识别。现代雷达普遍采用频率捷变方式,传统的信号分选算法往往会造成增批问题。对接收到的信号进行高精度频率估计,利用相邻2个信号频率差相除,在一定的搜索范围内,通过比较相除结果的小数部分,来分选出不同雷达信号。根据分选出的来自同一部雷达信号,用相同方法可估计出信号的分频系数,从而估计出雷达的基准频率。仿真结果表明:该算法可有效地分选捷变频雷达信号,抑制增批问题的产生,可对特定辐射源进行准确识别。

关键词: 雷达工程, 信号分选, 频率捷变, 增批, 频率估计, 相除, 小数部分

Abstract: Frequency agility mode is widely used in modern radar. Traditional algorithms often result in the increasing batch in signal sorting. This algorithm estimates the frequency of received signals with high precision firstly. The results can be got by dividing the frequency differences of two adjacent signals. Within a certain range, the signals from different radars are sorted by comparing the fractional part of the results. According to the signals from the same radar, frequency dividing coefficients are estimated by the same way. Finally, reference frequency can be gained. Simulation results show that this algorithm can sort the signals from frequency agility radar effectively. And, it can restrain the increasing batch in the signal sorting and recognize the specific emitters accurately.

Key words: radar engineering, signal sorting, frequency agility, increasing batch, frequency estimation, division, fractional part

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