Multi-frequency range TETRA digital cluster detection method and apparatus

Abstract

The invention discloses a multi-frequency range TETRA digital cluster detection apparatus and a detection method applying the apparatus. The apparatus comprises a multi-frequency range receiver radio frequency front end, a digital intermediate frequency processing plate, a reference source and a secondary power supply, and is characterized in that the multi-frequency range receiver radio frequency front end simultaneously receiving a multipath signal within any one frequency range; the digital intermediate frequency processing plate is in charge of processing of receiving data and control of a whole machine, and provides an external interface; the reference source provides a reference clock; and the secondary power supply supplies working power to the other aforementioned parts. By using the method and apparatus provided by the invention, the realization complexity and production cost of a TETRA digital cluster detection apparatus can be reduced, and the interference resistance 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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