dmr digital walkie-talkie real-time intercom system
A digital walkie-talkie, TMS320F2812 technology, applied in the field of electronic technology/communication, can solve the problem of not opening the data link layer and physical layer, unable to realize precise forced interjection of a single user, unable to realize protocol custom jumping, etc.
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[0014] DMR digital walkie-talkie real-time intercom system, such as figure 1 As shown, it consists of a central processing unit TMS320F2812, a DDS radio frequency chip, an AMBE3000 vocoder, a microphone, a keyboard, a screen and a power supply module; the user enters the number of the called digital walkie-talkie through the keyboard, and starts to speak, and the microphone collects the user's voice. After being sent to the AMBE3000 vocoder for encoding, the central processor TMS320F2812 combines the number of the called digital walkie-talkie to perform DMR protocol framing, transmit through the DDS radio frequency circuit, and complete the signaling handshake between the called digital walkie-talkie and another digital walkie-talkie , At the beginning of the stage of normal voice communication, the DMR digital walkie-talkie real-time interjection system acts as a third party to forcibly insert the warning voice to realize the real-time DMR digital two-way intercom. The screen...
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