The difference between analog walkie-talkie, digital walkie-talkie and mobile phone walkie-talkie
In terms of design technology, radio walkie-talkies can be divided into analog walkie-talkies with analog communication technology (that is, our common traditional walkie-talkies) and digital walkie-talkies designed with digital technology. The analog walkie-talkie modulates the stored signal to the transmission frequency of the walkie-talkie, while the digital walkie-talkie digitizes the voice information and transmits it in the form of digital encoding, that is, all modulations on the transmission frequency of the walkie-talkie are digital.
Digital walkie-talkies have many advantages. First of all, they can make better use of spectrum resources. Similar to cellular digital technology, digital walkie-talkies can load more users on a designated channel and improve spectrum utilization. This is a solution to frequency congestion and has long-term significance. Bullying is to improve the quality of calls. With digital communication technology with in-system error correction function, compared with analog walkie-talkies, it can achieve better voice and audio quality in a wider range of signal environments, and it will receive less audio noise and clearer. .
The latter is to improve and improve the integration of voice and data, and to change the weakness of the control signal that decreases as the communication distance increases. Compared with similar integrated analog voice and data systems, digital walkie-talkies can provide better data processing and interface functions, so that more data should be integrated into the same two-way wireless communication base station structure, for voice and data services The integration is more complete and convenient. These three characteristics make digital walkie-talkies an inevitable trend in the development of future walkie-talkies. But for everyone, it is too early to say that analog is moving towards digitalization.
Mobile phone walkie-talkie, also known as POC, refers to a half-duplex voice service based on mobile cellular packet domain bearer and using voip technology. Support one-to-one conversation, group conversation, broadcast, etc. Its characteristic is that with the help of IP technology, POC services can be "always online" and the mobile communication network covers a large area. And ordinary walkie-talkies have to be restricted in the transmission distance.