A wireless narrowband voice and data communication system and method

Abstract

The invention provides a system and method for wireless narrowband voice and data communication. The method comprises the following steps: judging whether a current call is an MSK (Minimum Shift Keying) digital signal or an analog signal; carrying out corresponding subaudio / two-tone / five-tone signaling processing and analog voice processing if the current call is the analog signal; and processing according to the process of a digital system if the current call is the MSK digital signal and the MSK digital signal is determined to be a digital system signal. According to the system and the method for wireless narrowband voice and data communication, aiming at the signal bandwidth through which the traditional analog transit station passes, the digital intercom communication function can be realized through an MSK modulation / demodulation mode without changing the arranged analog transit station. Furthermore, analog signaling functions, such as subaudio / two-tone / five-tone / MDC1200 and the like of the original analog intercom are made compatible; and compared with the existing dPMR and DMR digital intercom technologies, the cost is low, and the digital voice forwarding function can be realized in a manner that users have no need of purchasing a new digital transit station.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a wireless narrowband voice and data communication system and method. Background technique [0002] At present, most of the walkie-talkie and relay station products in the professional wireless communication field still use analog communication technology, which is in stark contrast to the public wireless communication that has widely used digital communication technology more than ten years ago. According to the "Notice of the Ministry of Industry and Information Technology on Matters Concerning the Frequency Planning and Use Management of 150MHz and 400MHz Specific Walkie-Talkies" issued by the Ministry of Industry and Information Technology on December 12, 2009 (referred to as "Document No. 666"), my country will gradually Realize the transition from analog to digital in the walkie-talkie industry. However, there is currently no national or industry standard for...

AI Technical Summary

Problems solved by technology

However, there are currently no national or industry standards for digital walkie-talkies

[0003] In foreign countries, ETSI has released DMR and dPMR digital walkie-talkie standards. However, to develop products that meet these standards, on the one hand, huge R&D costs will be invested, and on the other hand, traditional analog relay stations and Analogue walkie-talkies are stuck in the "end of life" situation, which is a huge waste of invested resources

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