GNSS interference source positioning method based on radio wave propagation model

Abstract

The invention discloses a GNSS interference source positioning method based on a radio wave propagation model. The method comprises the following steps of: (1) reasonably arranging detection nodes ina monitoring area range; (2) if the detection nodes detect an interference signal with the power exceeding a predetermined threshold, determining that there is interference; (3) receiving and processing the monitoring data sent by each detection node, and analyzing the position of the detection nodes, the power of the received interference signal, and the environment type information, then performing GNSS interference source positioning in combination with the radio wave propagation model by a center node; and (4) after the center node performs the interference source positioning, calculatingthe equivalent radiation power of an interference source by using the radio wave propagation model based on the detection node closest to the interference source. The GNSS interference source positioning method based on the radio wave propagation model adopts the radio wave propagation model applicable to various environments to calculate the losses of signal propagation paths, thereby improving the positioning accuracy of the interference source.

Description

technical field [0001] The invention belongs to the field of electromagnetic interference research, and particularly relates to a method for locating a GNSS signal interference source in the field. Background technique [0002] Satellite navigation has been integrated into various application fields including transportation, surveying and mapping, communication, radar, aviation, and scientific research. GNSS (Global Navigation Satellite System) provides real-time precise position, speed and time information to countless users on land, sea, air and space around the world. However, due to the increasingly complex electromagnetic environment, intentional or unintentional interference, and the vulnerability of satellite signals themselves, satellite navigation signals are susceptible to interference. [0003] Once the GNSS signal is interfered, it will not only affect the normal life of ordinary users, but also seriously affect the key infrastructure closely related to national...

AI Technical Summary

Problems solved by technology

Among them, the TDOA-based interference source location method has high positioning accuracy, but the disadvantage is that multiple monitoring nodes need to achieve strict time synchronization, and cannot detect and locate single-frequency interference or narrow-band interference, and the system equipment is relatively complex and costly. High; FDOA positioning accuracy is poor, and it cannot locate relatively static interference sources, and usually cannot be used alone; AOA is a direction finding and positioning method that is widely used, and can be divided into amplitude comparison method and phase comparison method. The former It is relatively simple but has the disadvantages of poor positioning accuracy and susceptibility to noise. The latter usually uses the principle of correlation interference for direction finding, but has the disadvantages of complex equipment and high cost.

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