和差天线空时自适应测角方法及性能分析

doi:10.12263/DZXB.20211458

电子学报 ›› 2023, Vol. 51 ›› Issue (1): 42-49.DOI: 10.12263/DZXB.20211458

和差天线空时自适应测角方法及性能分析

阚庆云, 许京伟, 廖桂生

西安电子科技大学雷达信号处理国家重点实验室，陕西西安 710071

收稿日期:2021-10-27 修回日期:2022-06-08 出版日期:2023-01-25
- 作者简介:
- 阚庆云女，1997年11月出生于安徽省宿州市.现为西安电子科技大学博士研究生.主要研究方向为空时自适应处理，动目标检测.E-mail: kqy@stu.xidian.edu.cn
  许京伟（通讯作者）男，1987年5月出生于山东省日照市.现为西安电子科技大学副教授，博士生导师.主要研究方向为波形分集技术、雷达系统建模、阵列信号处理等.
  廖桂生男，1963年6月出生于广西壮族自治区桂林市.现为西安电子科技大学教授，博士生导师.主要研究方向为雷达系统技术、阵列信号处理、动目标检测等.E-mail: liaogs@xidian.edu.cn
- 基金资助:
- 国家自然科学基金 (61931016)

Angle Estimation Approach and Performance Analysis for STAP with Sum-Difference Antenna

KAN Qing-yun, XU Jing-wei, LIAO Gui-sheng

National Laboratory of Radar Signal Processing, Xidian University, Xi’an, Shaanxi 710071, China

Received:2021-10-27 Revised:2022-06-08 Online:2023-01-25 Published:2023-02-23
- Supported by:
- National Natural Science Foundation of China (61931016)

摘要/Abstract

摘要：

雷达模拟和差天线技术通过射频功率合成器形成和差波束，在目标角度测量中应用广泛，然而运动平台雷达经过空时自适应处理（Space-Time Adaptive Processing，STAP）后难以还原鉴角曲线，即自适应处理后的等效鉴角曲线与静态鉴角曲线发生偏离.针对此问题，本文提出和差天线体制雷达空时自适应测角方法.该方法通过和差STAP算法抑制杂波后实现角度估计，并且通过理论推导建立了角度估计与和通道输出信噪比、差通道剩余杂噪比之间的关系，重点分析了杂波剩余对角度估计的非一致性影响.仿真实验验证了本文方法的有效性.

关键词: 运动平台雷达, 和差天线体制, 空时自适应处理, 杂波抑制, 单脉冲测角

Abstract:

Analog sum-difference antenna radar forms sum-difference beam through radio frequency power synthesizer, which is widely used in target angle estimation. However, after space-time adaptive processing (STAP), it is difficult for moving platform radar to restore the angle identification curve, that is, the equivalent angle identification curve after adaptive processing deviates from the static angle identification curve. To solve this problem, this paper proposes a space-time adaptive angle estimation method for STAP with sum-difference antenna system. In this method, the angle estimation is realized after suppressing clutter by sum-difference STAP algorithm. The relationship between angle estimation and the output signal-to-noise ratio of the sum channel, residual clutter-to-noise ratio of the difference channel is established by theoretical deduction. This paper analyzes the influence of clutter residue on the inconsistency of angle estimation emphatically. Simulation results verify the effectiveness of the proposed method.

Key words: moving platform radar, sum-difference antenna system, space-time adaptive processing, clutter suppression, monopulse angle estimation

中图分类号:

TN959.73

阚庆云, 许京伟, 廖桂生. 和差天线空时自适应测角方法及性能分析[J]. 电子学报, 2023, 51(1): 42-49.

Qing-yun KAN, Jing-wei XU, Gui-sheng LIAO . Angle Estimation Approach and Performance Analysis for STAP with Sum-Difference Antenna[J]. Acta Electronica Sinica, 2023, 51(1): 42-49.

图/表 7

参考文献 23

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参数名称	参数值	参数名称	参数值
载波频率	1.25 GHz	脉冲数	64
波长	0.24 m	脉冲重复频率	2 kHz
阵元间距	0.12 m	和波束旁瓣电平	-30 dB
阵列行数	12	差波束旁瓣电平	-30 dB
阵列列数	36	波束指向方位角	90°
采样率	5 MHz	波束指向俯仰角	0°
平台速度	120 m/s	目标方位角	91°
平台高度	8 km	目标俯仰角	0°

参数名称	参数值	参数名称	参数值
载波频率	1.25 GHz	脉冲数	64
波长	0.24 m	脉冲重复频率	2 kHz
阵元间距	0.12 m	和波束旁瓣电平	-30 dB
阵列行数	12	差波束旁瓣电平	-30 dB
阵列列数	36	波束指向方位角	90°
采样率	5 MHz	波束指向俯仰角	0°
平台速度	120 m/s	目标方位角	91°
平台高度	8 km	目标俯仰角	0°

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和差天线空时自适应测角方法及性能分析

Angle Estimation Approach and Performance Analysis for STAP with Sum-Difference Antenna

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