基于软件无线电的低成本多通道无线电测向系统

A. Sedunov, N. Sedunov, H. Salloum, A. Sutin
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引用次数: 0

摘要

一种无线电测向(RDF)系统,用于查找恶意行为者使用的通信的方位线(LOB),可能是非法船只活动探测的有用工具。从事非法活动(例如走私)的船只船员,可使用不同频率的射频通讯系统,与在其他船只或陆地上的同伙通讯。与VHF、UHF双向无线电相比,公民波段(CB)无线电被USCG使用的电子情报(ELINT)和测向截获的机会更少。此外,走私者还使用27兆赫GPS浮标,给漂浮在开阔水域的包裹贴上标签,以供同伙取走。为了检测这种活动,RDF系统应该能够检测到远距离、少量和短的传输,并且发生在任何信道上。该系统应支持安装在车辆或船舶上,以提高机动性。史蒂文斯理工学院已经开发并测试了一种低成本RDF系统,该系统能够在基于软件定义无线电(SDR)和伪多普勒(PD)测向原理的多个信道上同时探测远距离传输的同时测向。软件与用户友好的界面已经开发处理,显示结果,并与实时地图系统集成。同样的方法也可用于在其他频带中工作的RDF。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Low-cost multichannel radio direction finding system based on software-defined radio
A radio direction finding (RDF) system to find line-of-bearing (LOB) towards communication used by nefarious actors may be a useful tool for illegal boat activity detection. Crews of boats involved in illegal activities, such as smuggling, may communicate with their accomplices on other boats or land using various RF communication systems with different frequencies. The Citizen Band (CB) radios have less of a chance to be intercepted by Electronic Intelligence (ELINT) and direction finding used by the USCG than VHF, UHF two-way radios. Also, 27 MHz GPS buoys are used by smugglers to tag packages left afloat in open water to be picked up by an accomplice. To detect such activity RDF system should be able to detect transmissions that are: distant, few, and short and occurring on any channel. The system should support installation on a vehicle or a boat for mobility. Stevens Institute of Technology has developed and tested a low-cost RDF system, that is capable of simultaneous direction-finding towards distant transmissions with simultaneous detection on multiple channels based on software-defined radio (SDR) and pseudo-doppler (PD) principles of direction-finding. Software with a user-friendly interface has been developed to process, display results, and integrate with mapping systems in real-time. The same approach can be used for RDF working in the other frequency bands.
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