An indoor illegal signal source location system and method based on signal arrival direction

Abstract

The invention discloses an indoor illegal signal source positioning system and method based on signal arrival direction. The system includes a multi-channel wide-band signal receiver, an aperture adaptive adjustment unit, a uniform linear array antenna and a signal processing unit. The method is: use a multi-channel broadband receiver to conduct parallel frequency scanning investigation on the specified frequency band, and judge the signal exceeding the intensity threshold as a suspicious signal; the multi-channel broadband receiver locks the frequency of the suspicious signal, and the aperture adaptive adjustment unit adjusts the uniform linear array antenna element distance; measure and record the array snapshot data of suspicious signals, and use the super-resolution arrival angle algorithm to calculate the direction angle space spectrum of the array signal; find the position of the direct path in the direction angle space spectrum according to the direct path identification algorithm; change the test point Position, repeat measurement and calculation, get the position of illegal signal source through cross positioning. The invention has the advantages of simplicity, reliability and low cost, can realize single-station positioning, and is convenient to deploy and flexible to use.

Description

technical field [0001] The invention relates to the technical field of passive positioning in wireless communication systems, in particular to an indoor illegal signal source positioning system and method based on signal arrival direction. Background technique [0002] In recent years, new technologies represented by artificial intelligence, big data, and the Internet of Things have developed rapidly, and have penetrated into all aspects of human society, politics, economy, and military activities. Information security, network security, and data security have become important factors for the stable development of countries Intelligence theft and espionage using information technology have also become more difficult to prevent. In addition, increasingly rampant terrorism and extremism also use information technology to threaten public security and social order. Key national departments, key national defense facilities, scientific research and confidentiality units, and othe...

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