北京航空航天大学学报 ›› 2020, Vol. 46 ›› Issue (1): 122-132.doi: 10.13700/j.bh.1001-5965.2019.0133

• 论文 • 上一篇    下一篇

频率分集阵列负型模糊函数特性仿真

王博1, 谢军伟1, 张晶2, 孙渤森3   

  1. 1. 空军工程大学 防空反导学院, 西安 710051;
    2. 陕西交通职业技术学院, 西安 710018;
    3. 西安财经大学 信息学院, 西安 710100
  • 收稿日期:2019-03-27 发布日期:2020-01-21
  • 通讯作者: 谢军伟 E-mail:xjw_xjw_123@163.com
  • 作者简介:王博,男,博士研究生。主要研究方向:频率分集阵列雷达信号处理及干扰抑制方法;谢军伟,男,博士,教授,博士生导师。主要研究方向:隐身与反隐身、雷达电子战;张晶,女,硕士,讲师。主要研究方向:频率分集阵列雷达信号处理。
  • 基金资助:
    国家自然科学基金(61503408)

Negative ambiguity function characteristics simulation of FDA

WANG Bo1, XIE Junwei1, ZHANG Jing2, SUN Bosen3   

  1. 1. Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China;
    2. Shaanxi College of Communication Technology, Xi'an 710018, China;
    3. School of Information, Xi'an University of Finance and Economics, Xi'an 710100, China
  • Received:2019-03-27 Published:2020-01-21
  • Supported by:
    National Natural Science Foundation of China (61503408)

摘要: 现有研究主要是关于频率分集阵列(FDA)基于阵元发射窄带条件下单载频信号的假设而展开的,缺乏对线性调频(LFM)信号是否适用于FDA问题的研究。考虑到基于模糊函数的优化是雷达波形设计的重要手段,在建立FDA数据模型的基础上,建立线阵发射、单天线接收模型下的FDA负型模糊函数,系统分析其主要特性。在此基础上,仿真分析了基于矩形脉冲、线性调频信号以及采用不同非线性频控函数的FDA负型模糊函数特性,对比了采用不同非线性频控函数的FDA的目标距离-角度二维联合估计性能。仿真结果在验证FDA模糊函数建立正确性的同时,得出采用正弦频控函数的FDA性能最优的结论。从而为基于模糊函数的复杂信号FDA波形设计以及基于FDA方向图解耦技术的发射波形设计奠定了重要基础。

关键词: 频率分集阵列(FDA), 模糊函数, 非线性频偏, 矩形脉冲信号, 线性调频信号

Abstract: Considering that the existing extensive research on frequency diverse array (FDA) is mainly working on the assumption that single-carrier frequency signals are transmitted under narrow-band conditions. And there is a lack of relevant research on the issue whether linear frequency modulation signals are suitable for FDAs. Considering that ambiguity function based optimization is an important means of radar's waveform design, based on the establishment of FDA data model, this paper establishes FDA negative ambiguity function under linear array transmission and single-antenna reception model and analyzes its main characteristics systematically. On this basis, the characteristics of FDA negative ambiguity function based on rectangular pulse, linear frequency modulation (LFM) signal and different nonlinear frequency offset are simulated and compared. The performance of target range-angle two-dimensional joint estimation of FDA using different nonlinear frequency control functions is compared. The simulation results verify that the FDA ambiguity function is correct, and the performance of FDA with sinusoidal frequency offset is the best. This lays an important foundation for the complex signal FDA waveform design based on ambiguity function and the transmission waveform design based on FDA beampatten decoupling technology.

Key words: frequency diverse array (FDA), ambiguity function, nonlinear frequency offset, rectangular pulse signal, linear frequency modulation signal

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