改进的近地谐波探测传播模型

李远哲; 胡卫东; 范红旗; 杜小勇

doi:10.12265/j.cjors.2021282

改进的近地谐波探测传播模型

doi: 10.12265/j.cjors.2021282

国防科技大学自动目标识别重点实验室, 长沙 410073

详细信息

作者简介:
李远哲：(1995—)，男，福建人，国防科技大学电子科学学院博士研究生，研究方向为非线性系统建模、雷达信号处理、智能目标识别等

胡卫东：(1967—)，男，辽宁人，国防科技大学电子科学学院教授，博士生导师，研究方向为雷达信息处理、自动目标识别技术研究、多源信息融合等

范红旗：(1978—)，男，陕西人，国防科技大学电子科学学院副教授，硕士生导师，研究方向为主动感知系统、目标跟踪、信息融合与智能导引等

通讯作者:
李远哲 E-mail: liyuanzhe14@nudt.edu.cn

中图分类号: TN95
计量
- 文章访问数: 107
- HTML全文浏览量: 31
- PDF下载量: 11
- 被引次数: 0
出版历程
- 收稿日期: 2021-10-25
- 录用日期: 2022-04-14
- 网络出版日期: 2022-04-14

Modified propagation model for near-ground harmonic detection

National Key Laboratory of Science and Technology on Automatic Target Recognition, National University of Defense Technology, Changsha 410073, China

摘要

摘要: 对工作于近地条件的谐波探测系统，自由空间假设下导出的谐波雷达方程已经不足以预测和解释观测过程中的诸多现象，故本文基于目标特性和环境因素研究了这类系统的修正传播模型。一是引入目标谐波特性修正，使得接收谐波随距离的衰减率更加符合实际测量；二是引入基波和谐波的多径效应分析，使得模型具备预测和解释近地观测的接收功率振荡现象。此外进行仿真分析并搭设了测量系统，设计了室内近程和室外长程的实测实验，验证了传播模型所预测的探测盲区现象，并提出了对其加以缓解和利用的思路构想，对近地谐波探测系统设计和性能评估具有积极意义.
- 谐波探测 /
- 谐波雷达方程 /
- 非线性探测 /
- 传播模型 /
- 多径效应
Abstract: For harmonic detection systems working in near-Earth conditions, the harmonic radar equation derived under the free space hypothesis is not enough to predict and explain many phenomena in the measurement, so this paper studies the modified propagation model for such systems based on the characteristics of the target and environmental factors. The target harmonic characteristic is introduced in the propagation model, which makes the harmonic attenuation rate more in line with the actual measurement. Besides, the multi-path effect analysis of fundamental and harmonic makes the model have the ability to predict and explain the receiving power strength oscillation at a certain distance. In addition, simulations are conducted and measurement systems are set up, and indoor near-range and outdoor long-range experiments are designed to verify the predicted detection blind spot by the model. The idea of mitigating and utilizing it is proposed, which has positive significance for the design and performance evaluation of near-ground harmonic detection systems.
- harmonics detection /
- harmonic radar equation /
- nonlinear detection /
- propagation model /
- multipath effects

HTML全文

图 1 谐波雷达的原理框图

Fig. 1 Schematic diagram of harmonic radar

下载: 全尺寸图片幻灯片

图 2 修正传播模型的几何关系图

Fig. 2 Geometry of modified propagation model

下载: 全尺寸图片幻灯片

图 3 谐波特性测量系统框图

Fig. 3 Diagram of harmonic characteristic measuring system

下载: 全尺寸图片幻灯片

图 4 多个非线性单元的谐波效率曲线

Fig. 4 Harmonic efficiency curves for multiple nonlinear units

下载: 全尺寸图片幻灯片

图 5 A157101不同工作状态下的谐波效率曲线

Fig. 5 A157101’s harmonic efficiency curves under different working conditions

下载: 全尺寸图片幻灯片

图 6 目标基波激励功率仿真结果

Fig. 6 Simulations of stimulating power on target with range

下载: 全尺寸图片幻灯片

图 7 修正传播模型仿真结果

Fig. 7 Simulations of revised propagation model with range

下载: 全尺寸图片幻灯片

图 8 近程测试、长程测试、测试目标实物图（上）与测试系统框图（下）

Fig. 8 Photos of short-range test, long-range test and DUT (above) and diagram of testing system (below)

下载: 全尺寸图片幻灯片

图 9 室内近程测试结果和仿真对比

Fig. 9 Simulation and measuring results of short-range test

下载: 全尺寸图片幻灯片

图 10 室外长程测试结果与仿真对比

Fig. 10 Simulation and measuring results of long-range test

下载: 全尺寸图片幻灯片

参考文献(16)

[1]	丁宏庆, 黎滨洪, 周学松. 微波照射金属结时再辐射的特性及其与PN结的区别[J]. 电子学报,2000,28(2):55-58. DOI: 10.3321/j.issn:0372-2112.2000.02.017 DING H Q, LI B H, ZHOUXS. Re-radiation characteristics of metal-oxide-metal junction excited by incident microwave and its difference from PN junction[J]. Acta electronica sinica,2000,28(2):55-58. (in Chinese) DOI: 10.3321/j.issn:0372-2112.2000.02.017
[2]	陶然, 李喜民. 非线性目标特性研究[J]. 北京理工大学学报, 1997(6): 75-78. On the characteristics of nonlinear targets[J]. Transactions of Beijing Institute of Technology, 1997(6): 739-742. (in Chinese)
[3]	MAERTONE A F, DELP E J. Characterization of RF devices using two-tone probe signals[C]// IEEE Workshop on Statistical Signal Processing Proceedings, 2007: 161-165.
[4]	MAERTONE A F, RAOULT J, MARIJON R, et al. RF Front-ends nonlinearity characterization using reflected power[J]. IEEE transactions on electromagnetic compatibility,2017,59(6):1925-1931. DOI: 10.1109/TEMC.2017.2666549
[5]	ANIKTAR H, BARAN D, KARAV E, et al. Getting the bugs out: a portable harmonic radar system for electronic counter surveillance applications[J]. IEEE microwave magazine,2015,16(10):40-52. DOI: 10.1109/MMM.2015.2465591
[6]	MASCANZONI D, WALLIN H. The harmonic radar: a new method of tracing insects in the field[J]. Ecological entomology,1986,11(4):387-390. DOI: 10.1111/j.1365-2311.1986.tb00317.x
[7]	HARGER R O. Harmonic radar systems for near-ground in-foliage nonlinear scatterers[J]. IEEE transactions on aerospace and electronic systems,1976,AES-12(2):230-245. DOI: 10.1109/TAES.1976.308301
[8]	POWERS E J, HONG J Y, KIM Y C. Cross sections and radar equation for nonlinear scatterers[J]. IEEE transaction on aerospace electronic system,1981,4:602-6051.
[9]	COLPITTS B G, BOITEAU G. Harmonic radar transceiver design: miniature tags for insect tracking[J]. IEEE transactions on antennas and propagation,2004,52(11):2825-2832. DOI: 10.1109/TAP.2004.835166
[10]	GALLAGHER K A, MAZZARO G J, MARTONE A F, et al. Derivation and validation of the nonlinear radar range equation[C]// Radar Sensor Technology XX. International Society for Optics and Photonics, 2016.
[11]	李传泗. 雷达目标的非线性再辐射及应用[J]. 火控雷达技术,1986(4):1-6.
[12]	李喜民. 非线性目标特性和谐波雷达的研究[J] 火控雷达技术, 1994(1): 15-25.
[13]	HARZHEIM T, MüHEML M, HEUERMANN H. A SFCW harmonic radar system for maritime search and rescue using passive and active tags[J]. International journal of wireless and microwave technologies,2021,13(7):1-17.
[14]	NOURSHAMSI N, VAKALIS S, NANZER J A. Joint detection of human and object motion using harmonic micro-Doppler radar and harmonic tags[J]. IEEE antennas and wireless propagation letters,2020,19(6):930-934. DOI: 10.1109/LAWP.2020.2983012
[15]	胡云. 微波两径传播模型影响因素分析[J]. 大学物理,2017,36(10):48-51+81. HU Y. Analysis of influence factors for the model of microwave two-path propagation[J]. College physics,2017,36(10):48-51+81. (in Chinese)
[16]	PAVLK R, HERTL I, POLACEK V, et al. An experimental investigation into the advanced harmonic radar detection system[C]//Proceedings of International Radar Symposium IRS, 2009: 10-11.