基于旁瓣对消器的自适应零陷优化设计

曹运合; 郭勇强; 刘帅; 刘玉涛

doi:10.11999/JEIT190296

基于旁瓣对消器的自适应零陷优化设计

doi: 10.11999/JEIT190296

曹运合^{1, 2, ,},
郭勇强¹,
刘帅¹,
刘玉涛²

1.
西安电子科技大学雷达信号处理国家重点实验室西安 710071
2.
通信网信息传输与分发技术重点实验室石家庄 050081

基金项目: 国家自然科学基金(61771367)，通信网信息传输与分发技术重点实验室开放基金(HHS19641X003)

详细信息

作者简介:
曹运合：男，1978年生，教授，博士生导师，研究方向为雷达信号处理、阵列信号处理、高速实时信号处理、DSP与FPGA开发

郭勇强：男，1993年生，硕士生，研究方向为阵列信号处理、智能化雷达有源干扰抑制

刘帅：男，1995年生，博士生，研究方向雷达信号处理、捷变频信号处理

刘玉涛：男，1981年生，博士，高级工程师，研究方向为移动自组织网、认知无线电等

通讯作者:
曹运合　caoyunhe@mail.xidian.edu.cn

中图分类号: TN911.7
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- 被引次数: 0
出版历程
- 收稿日期: 2019-04-29
- 修回日期: 2019-11-01
- 网络出版日期: 2019-11-12
- 刊出日期: 2020-03-19

Adaptive Null Broadening Algorithm Based on Sidelobes Cancellation

1.
National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2.
Science and Technology on Communication Networks Laboratory, Shijiazhuang 050081, China

Funds: The National Natural Science Foundation of China (61771367), The Open Foundation of Science and Technology on Communication Networks Laboratory (HHS19641X003)

摘要

摘要:
现有的零陷展宽算法忽略了锥化矩阵的相位信息，在对抗强方向性、大偏差角干扰时，零陷深度变浅，干扰抑制性能严重下降。该文以虚拟空域密集干扰为切入点，推导并提出一种可用于旁瓣对消器的自适应零陷优化设计算法。该算法通过对辅助阵列数据的自协方差矩阵和主辅阵列数据的互协方差矩阵同时进行重构实现零陷区域的自适应控制，锥削矩阵只与阵元位置和展宽宽度有关，无需干扰信息，可以离线生成，不占用系统运算资源。仿真结果表明，该方法可以实现零陷区域的自适应展宽，提高非平稳干扰抑制的稳健性。
- 阵列信号处理 /
- 旁瓣对消器 /
- 稳健性 /
- 零陷展宽
Abstract:
In existing null broadening algorithm, the taper matrix does not contain phase information, and when it is used to against strong directional and large deviation angle interference, the null depth becomes shallow and the interference suppression performance drops seriously. An adaptive null broadening algorithm for sidelobe canceller is proposed based on dense disturbance in virtual airspace. The algorithm reconstructs the self-covariance matrix of the auxiliary array data and the co-covariance matrix of the main and auxiliary array data at the same time to realize the adaptive control of the null region. The taper matrix is only related to the position and width of the array elements, and it can be generated offline without disturbing information and occupying no computing resources of the system. The simulation results show that this method can achieve adaptive broadening of the null region and improve the robustness of non-stationary interference suppression.
- Array signal processing /
- Sidelobe canceller /
- Robustness /
- Null broadening

HTML全文

图 1 不同零陷展宽区域效果图

下载: 全尺寸图片幻灯片

图 2 同侧等零陷展宽合成方向图

下载: 全尺寸图片幻灯片

图 3 自适应零陷展宽前后合成方向图

下载: 全尺寸图片幻灯片

图 4 输出信干噪比随角度偏差变化图

下载: 全尺寸图片幻灯片

表 1 不同展宽算法运算时间比较(ms)

零陷展宽算法运算时间

文献[15] 0.157076
本文算法 0.175632

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