Is there a digital walkie talkie, and what is the difference between the analog machine and the digi

The digital walkie-talkie is designed with digital technology to digitize the voice signal and propagate it in the form of digital encoding, that is, all modulation on the transmission frequency of the walkie-talkie is digital.

Only walkie-talkies that directly use digital signal processors are digital walkie-talkies in the true sense, while walkie-talkies that use digital control signals (such as walkie-talkies in trunking systems) do not belong to digital walkie-talkies.

Digital walkie-talkies have many advantages, the first is that they can make better use of spectrum resources, similar to cellular digital technology, digital walkie-talkies can load more users on a designated channel such as 25kHz, improve spectrum utilization, which is a solution to frequency congestion, which has long-term significance. The second is to improve the voice quality. Because digital communication technology has an in-system error correction function, compared with analog walkie-talkies, it can achieve better voice audio quality in a wider range of signal environments, and it will receive less audio noise and sound clearer.

The last point is to improve and improve the voice and data integration, change the weakness of the control signal with the increase of communication distance, compared with similar integrated analog voice and data systems, digital walkie-talkies can provide better data processing and interface functions, so that more data applications can be integrated into the same two-way wireless communication base station structure for voice and data service integration is more complete and more convenient.

Digital walkie-talkies are now starting to gain popularity.

**General name: Nantong professional walkie-talkie.

Difference Between Analog Walkie-Talkie and Digital Walkie-Talkie:

1. Speech signal processing.

Traditional analog walkie-talkie: a communication mode that modulates voice, signaling, and signals to the carrier frequency of the walkie-talkie in a continuous wave mode, and optimizes the processing such as amplification.

Digital walkie-talkie: digitizes the voice signal, in a specific digital way of coding rock trembling stool code and a specific baseband modulation form, and adopts the digital signal processing coarse travel manager to optimize the data communication mode.

2. Utilization of spectrum resources.

Digital walkie-talkies can better use spectrum resources. Similar to cellular digital technology, digital radios can load more users on a designated channel and improve spectrum utilization, which is a solution to frequency congestion.

3. Call quality.

Digital intercom improves call quality. Due to the in-system error correction function of digital communication technology, compared with analog walkie-talkies, it can achieve better voice audio quality in a wider range of signal environments, and it will receive less audio noise and sound clearer.

At present, conventional digital walkie-talkies are divided into three systems: "code division multiple access", "frequency division multiple access" and "time division multiple access". At present, there is no unified standard in the world.

According to the degree of technological advancement, they are sorted as: "code division multiple access", "frequency division multiple access" and "time division multiple access".

At present, China's Ministry of Information Industry coexists in three systems.

The three systems cannot be interconnected, and they will be completely free to choose according to technology, function, and cost performance.

Code division multiple access:

At present, the technology is the most advanced, and the technology has been fully adopted in the United States, and the "time division multiple access" has been phased out.

Frequency Division Multiple Access (FDMA):

The FDMA digital system is widely used in Europe, America and Japan, and the system (taking Kenwood Company in Japan as an example) uses DSP for audio processing, with rich application modes. The system is a multi-purpose communication system that can be upgraded in stages according to the needs of users from the traditional analog frequency modulation mode to the digital conventional mode and then to the digital trunking mode.

Mixed Analog and Digital Use – Both the wireless terminal and the base station of the FDMA system have an analog mode of 25kHz.

Time Division Multiple Access (TDMA).

TDMA system (take Motorola and Hytera systems as examples).

Time Division Multiple Access Digital Systems (TSAs) are inherently secure and prevent eavesdropping by devices such as scanning devices, and the chance of being snooped is almost nil. It will not be bothered by illegal user interference signals, and when the intercom rings, it must be a call related to the user.

Doubles the channel capacity and reduces equipment costs – TDMA systems that double the channel capacity by dividing the existing channel into 2 time slots via repeaters without the need for additional synthesis equipment. The system capacity is expanded, and the user investment is reduced.

Method: 1. When using the walkie-talkie, the first thing is to turn on the two walkie-talkies to be intercom, and then set the tuning type of the two walkie-talkies that need to be intercom to the same number, so that the frequency of the two walkie-talkies is set to the same.

2. It means that the pairing of these two walkie-talkies is successful. In the case of not shutting down, any walkie-talkie can be heard on another walkie-talkie, and the walkie-talkie call is realized.

3. When you want to use the walkie-talkie to talk to the other party, you need to press and hold the call button on the walkie-talkie to realize that the walkie-talkie can successfully send the words to the other party's walkie-talkie.

4. After the message is delivered, let go and wait for the other party. At this time, if the other party is there, you will hear the other party's reply on the walkie-talkie. The volume of the walkie-talkie can be adjusted on the walkie-talkie.

5. The walkie-talkie can not only be intercom for two people, but also for multiple people. And the use of multi-person intercom is also the same as the use of two-person intercom. First of all, they are turned on, and the frequency of each walkie-talkie that needs to be intercom can be adjusted to the same level, and the branch state can be multi-person intercom.

The difference between a walkie-talkie and a new communication number:

In the early years, the analog signal walkie-talkie used analog signal technology, which was converted into electromagnetic signals and transmitted through a special sound wave device, and then restored at the receiving end to generate electronic sound; The communication mode of the digital signal walkie-talkie is the same as that of the analog signal walkie-talkie, except that it is no longer a signal simulation, but directly encodes the audio signal closed bend, and then decodes and restores it through the corresponding decoder, and the communication distance and communication quality are much stronger than the analog signal of the analog land; As for the base station communication technology and IP walkie-talkie book, it is only a personal definition, it is essentially digital signal communication, but it is combined with the satellite, base station and adapter antenna of the communication network, and the use of mobile phone cards can realize ultra-long-distance real-time intercom calls. <>