基于投影余角的多普勒雷达几何检测器

doi:10.12305/j.issn.1001-506X.2022.06.11

摘要/Abstract

摘要：

针对多普勒雷达信号检测问题, 基于几何代数工具重新审视离散傅里叶变换, 提出了一种以投影余角为检验统计量的多普勒雷达几何检测器。该检测器相对传统功率/包络检测器具有良好的动态压缩性质与恒虚警特性。通过与现有功率/包络恒虚警检测器的对比试验, 表明了几何检测器对背景起伏与强多音信号干扰的优良适应能力, 为雷达检测器设计提供了一种新的视角和工具。

关键词: 信号检测, 多普勒雷达, 几何检测器, 几何代数, 背景起伏, 多目标干扰

Abstract:

To solve the problem of Doppler radar signal detection, the discrete Fourier transform is re-examined based on the geometric algebra tool. The Doppler radar geometric detector is designed with the projection angle as a new geometric test statistic. Compared with the traditional power/envelope detector, the performance of dynamic compression and constant false alarm of the proposed detector are excellent. Through several comparative experiments with existing constant false alarm rate detectors using power or envelope detection as its input, the excellent constant false alarm performance of the geometric detector and its ability to adapt to clutter and strong interference signals are illustrated. It provides a new perspective and a new tool for radar detection.

Key words: signal detection, Doppler radar, geometric detector, geometric algebra, background fluctuation, multi-target jamming

中图分类号:

梁璞, 范红旗, 付强. 基于投影余角的多普勒雷达几何检测器[J]. 系统工程与电子技术, 2022, 44(6): 1854-1861.

Pu LIANG, Hongqi FAN, Qiang FU. Geometric detector for Doppler radar based on projected complementary angle[J]. Systems Engineering and Electronics, 2022, 44(6): 1854-1861.

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参数含义	参数符号	典型值
积累脉冲数/个	N	512
虚警概率	P_fa	10^-5
脉冲重复频率/kHz	f_r	100
CFAR参考单元数目	L	32
噪声方差/dBm	2σ_w²	-2
信噪比/dB	ρ	20
杂噪比/dB	η	15
OS-CFAR排序参数	k	L/2

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