北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (4): 769-777.doi: 10.13700/j.bh.1001-5965.2018.0190

• 论文 • 上一篇    下一篇

基于频控阵的稳健Capon波束形成

冯晓宇1, 谢军伟1, 葛佳昂1, 张晶2, 王博1   

  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
  • 收稿日期:2018-04-09 出版日期:2019-04-20 发布日期:2019-04-26
  • 通讯作者: 谢军伟 E-mail:xjw_xjw_123@163.com
  • 作者简介:冯晓宇,男,硕士研究生。主要研究方向:FDA雷达信号处理;谢军伟,男,教授。主要研究方向:隐身与反隐身、雷达电子战。
  • 基金资助:
    国家自然科学基金(61503408)

Robust Capon beamforming based on frequency diverse array

FENG Xiaoyu1, XIE Junwei1, GE Jiaang1, ZHANG Jing2, WANG Bo1   

  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
  • Received:2018-04-09 Online:2019-04-20 Published:2019-04-26
  • Supported by:
    National Natural Science Foundation of China (61503408)

摘要: 为了克服相控阵波束仅具有角度分辨力的缺陷,频控阵通过在阵元间加入相对于载频十分微小的频率增量,实现了波束的距离-角度二维相关。引入3种接收信号处理机制,并对其进行理论推导分析,仿真说明了其中2种机制的实用性。针对指向误差存在情况下,估计的目标导向矢量与真实的目标导向矢量失配的问题,采用稳健Capon波束形成(RCB)算法,给出纠正偏差后的导向矢量闭式解,并在2种信号处理机制下,对其方向图进行了仿真。结果表明,利用RCB算法能在目标位置形成高增益,干扰位置形成零陷,验证了算法在频控阵中应用的有效性。

关键词: 频控阵, 信号处理, 指向误差, 稳健Capon波束形成(RCB), 导向矢量

Abstract: In order to overcome the defect that the phased array beam has only angular resolution, the two-dimensional range-angle correlation of the beam is realized by adding a very small frequency increment relative to the carrier frequency between the array elements in the frequency diverse array. Three kinds of reception signal processing mechanism were introduced, and the theoretical deduction and analysis were carried out. The simulation shows the practicability of the two mechanisms. Aimed at target steering vector estimation and real target steering vector mismatch problem in the presence of the pointing error, the closed solution of the corrected steering vector is given by using robust Capon beamforming(RCB) algorithm. And in the two kinds of signal processing mechanism, the beampattern is simulated. The simulation results show that the RCB algorithm can form a high gain in the target position and form a null in the interference position. The effectiveness of the algorithm in the frequency diverse array is verified.

Key words: frequency diverse array, signal processing, pointing error, robust Capon beamforming (RCB), steering vector

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