Maritime radio communication monitoring and direction finding system

Abstract

The invention relates to a maritime radio communication monitoring and direction finding system which is characterized by comprising a vertical polarization monitoring and direction finding antenna array, a five-channel signal switching module, an amplification module, a five-channel receiver, a digital signal processor (DSP) processing module, a computer, a monitoring and direction finding controller, a 3rd generation (3G) antenna, a radio station antenna, a 3G router, a digital broadcasting station, a switchboard, an electronic compass, a global positioning system (GSP) module and a GSP antenna. The maritime radio communication monitoring and direction finding system has the advantages that: an interfering signal can be monitored better due to the working frequencies ranging from 30 to 500MHz; simultaneous direction finding of several coherent waves is realized; simultaneous direction finding and ultrahigh-resolution digital direction finding of transmitting signals with same frequency and different directions are realized; direction finding of digital frequency hopping, a spread spectrum and a burst signal is realized; monitoring and measuring on different frequency domains, different time domains and different modulation domains can be simultaneously performed during measuring due to respective local oscillation of five channels; the problem of cross coupling among all antenna array elements is solved; the coupling and the phase ambiguity among unit antennas are removed; and dynamic application ranges of received signals are expanded.

Description

technical field [0001] The invention relates to a special narrowband (30MHz-500MHz) wireless communication monitoring and direction finding system on water, which belongs to the technical field of radio monitoring. Background technique [0002] With the development of my country's shipping industry and the rapid growth of water trade, there are more and more applications of radio equipment, and the interference of the legal communication frequency used by my country's river coast stations is becoming more and more serious. At present, the radio monitoring and direction-finding systems at home and abroad are basically based on land-based platforms established in cities to monitor and find the direction of land wireless communication signals or radio and television signals. The existing domestic and foreign radio monitoring and direction-finding equipment are characterized by: The frequency coverage is wide, the system is complex, and the price is expensive; second, it is base...

AI Technical Summary

Problems solved by technology

At present, the radio monitoring and direction-finding systems at home and abroad are basically based on land-based platforms established in cities to monitor and find the direction of land wireless communication signals or radio and television signals. The existing domestic and foreign radio monitoring and direction-finding equipment are characterized by: The frequency coverage is wide, the system is complex, and the price is expensive; second, it is based on a land-based platform or a vehicle, and the ship-borne equipment has its own special platform, and the three-dimensional movement has increased the technical requirements and difficulties for the monitoring and direction-finding equipment; Direction equipment does not have a comprehensive integrated water monitoring and direction-finding system that is closely integrated with electronic charts; 4. Existing equipment uses various means of wired / wireless networking, while water monitoring equipment can only use digital transmission stations in remote land areas Communication and data transmission, the reliability, security, anti-interference and error correction capabilities of monitoring equipment networking are more demanding

Therefore, the existing radio monitoring and direction-finding equipment cannot fully meet the actual needs of relevant departments' maritime radio monitoring tasks.

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