A multi-band tetra digital trunking detection method and device

Abstract

The invention discloses a multi-band TETRA digital trunking detection device and a detection method using the device. The radio frequency front end of the multi-band receiver, the digital intermediate frequency processing board, the reference source, and the secondary power supply are characterized in that: the radio frequency front end of the multi-band receiver simultaneously receives multiple signals in any frequency band; the digital intermediate frequency processing board It is responsible for the processing of received data and the control of the whole machine, and provides an external interface; the reference source provides a reference clock; the secondary power supply provides working power for the above parts. The implementation complexity and production cost of the TETRA digital cluster detection device can be reduced by adopting the invention, and the anti-interference performance is improved.

Description

technical field [0001] The invention relates to TETRA (terrestrial trunked radio) digital trunking communication, in particular to a multi-band TETRA digital trunking detection method and device. Background technique [0002] TETRA digital trunking communication system is a wireless trunking mobile communication system based on digital time division multiple access (TDMA) technology. The system is an open system designed and formulated by ETSI (European Telecommunications Standards Institute) to jointly use departments, manufacturers, testing departments and even government departments to meet the needs of professional departments in European countries for mobile communications. The TETRA digital trunking communication system can provide command and dispatch, data transmission and telephone services on the same technical platform. It not only provides multi-group dispatch functions, but also provides short data information services, packet data services and digital full-dupl...

AI Technical Summary

Problems solved by technology

[0021] (1) The existing technology involves the working frequency of the radio frequency signal of the satellite navigation receiver above 1GHz, while the working frequency of the TETRA digital trunking detection device is between 300MHz and 900MHz, so the method of the prior art is not suitable for the TETRA digital trunking detection device

[0022] (2) The existing technology involves the modulation method of the radio frequency signal of the satellite navigation receiver and the radio frequency receiving index cannot meet the requirements of the TETRA digital trunking detection device

[0023] (3) The existing technology does not involve the entire receiver device, but only involves the radio frequency front-end circuit of the satellite navigation receiver

[0035] (3) Adjacent channel suppression

[0042] (1) The existing technology involves the working frequency of the base station receiver of the TETRA digital trunking system is 800MHz, while the working frequency of the TETRA digital trunking detection device is 300MHz~900MHz, so the method of the prior art is not suitable for the multi-band TETRA digital trunking detection device

[0043] (2) The existing technology only involves the radio frequency working principle of the base station receiver of the TETRA digital trunking system, and does not describe the baseband signal processing scheme

[0044] (3) The base station receiver of the TETRA digital trunking system involved in the prior art is only a part of the multi-band TETRA digital trunking detection device, and does not involve the overall scheme of the multi-band TETRA digital trunking detection device

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