基于宽带准正交的CPPM信号实现高精度抗干扰的单机多域周界入侵探测

Leakage cable perimeter intrusion detection technology has the advantages such as good concealment property, low under-report rate, without detection blind area, and adaptation to the complex terrain environment. It has been widely used in security defense of some important and classified sites such as prison, bank, missile test range, restricted military zones and son on, and detects the illegal invasion position. However, due to the limited transmission distance of the leaky cable and the narrow bandwidth of probe signal, this method has the defects such as low location accuracy, small alert area and poor anti-electromagnetic interference. .In this project, we propose a novel leakage cable perimeter intrusion detection method which utilizes quasi-orthogonal, rate adjustable, broadband chaotic-pulse-position modulation(CPPM) signal as probe signal for the different alert areas. Based on the correlation detection and time-frequency domain conjoint analysis for instantaneous parameter, the high location accuracy in large alert area can be realized using a central data processing system. In this project, we will study how to generate the CPPM signal with quasi-orthogonality, adjustable rate and wide spectrum. Simultaneous detection of multiple intruders can be realized using a fast correlation measurement technique. Using the joint time-frequency domain analysis, the physical characteristics of the intruder can be identified. Besides, we will study the resistance ability of CPPM signal to external electromagnetic interference. Finally, we will develop a new perimeter intrusion detection technology with high location accuracy in large alert area and strong anti-electromagnetic interference. .The realization of this project can enhance the detection capability of our country in perimeter intrusion detection capability, and provide a technology support for the safe operation for important and classified sites.

泄漏电缆周界入侵探测技术具有隐蔽性高、漏报率低、无探测盲区、适应复杂地形变化等特点，被广泛用于监狱、银行、导弹试验场、军事禁区等机密重要场所的非法入侵探测。然而，受泄漏电缆传输距离有限和探测信号频带窄的影响，该方法存在定位精度低、警戒范围小和抗电磁干扰差的缺陷。.本项目提出利用准正交且速率可调的宽带混沌脉冲位置调制（CPPM）信号作为不同警戒区域的探测信号，基于一个中心处理系统通过相关检测和时频域瞬时参量联合分析实现大警戒范围内入侵者的精确定位和特征识别。研究准正交且速率可调的宽频带CPPM信号的产生与优化；研究利用快速相关测量技术同时定位多入侵者以及通过时频域联合分析识别入侵者的物理特征；研究CPPM信号对外界电磁干扰的抵抗能力。最终发展一种大警戒范围内高精度、抗干扰的新型周界入侵探测方法。.本项目的实现，将有助于提升我国周界入侵探测技术的检测能力，为机密重要场所提供可靠的安全保障手段。

基于泄漏电缆的周界入侵探测方法，相比于已有的激光扫描、红外传感、视频移动探测以及电子围栏等入侵探测技术，具有隐蔽性强、不受天气变化和地形环境影响以及无探测盲区等优势，但其仍存在距离分辨率和定位精度低、探测范围小以及抗电磁干扰能力弱等缺陷。本项目围绕如何改善基于泄漏电缆的周界入侵探测方法的距离分辨率、定位精度、探测范围以及抗电磁干扰能力展开研究，具体包括：宽带混沌信号的优化产生与特性分析、入侵者的精确定位和准确识别以及抗电磁干扰能力的分析验证。针对上述三项研究内容获得了以下结果：.（1）研制了宽带混沌信号发生器，可以产生准正交、速率可调且具有宽频带和良好自相关特性的混沌脉冲位置调制(CPPM)信号和布尔混沌信号作为探测信号。.（2）基于入侵前后的混沌相关曲线对比，实现了对单个入侵者的实时定位和跟踪以及多个入侵者的同时探测和区分，基于相关峰阈值判别排除小型动物干扰。该方法在310m的探测范围内距离分辨率可以达到30cm，定位误差小于1%。最终研制了基于泄漏电缆的入侵探测混沌导波雷达样机。.（3）基于混沌信号的自相关特性，实验研究了其抗电磁干扰能力，证明了该方法可实现复杂电磁环境中的入侵探测。.此外，本项目还开展了混沌雷达在穿墙成像、生命探测和入侵定位中的拓展研究。.项目成果提升了基于泄漏电缆的周界入侵探测方法检测能力，为重要机密场所提供更加安全可靠的防范保障。在本项目的资助下，发表论文23篇，其中，SCI收录15篇，EI收录3篇；申请国家发明专利16项，其中，已授权10项；培养博士和硕士研究生共7名。