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| Why does the walkie-talkie communication not require base station equipment, but the mobile phone ne |
| | Add time:2019/5/22 | First of all, we need to make it clear that the functions of mobile phones and walkie-talkies are different. In other words, before we design these two products, we have different market positioning for them, and thus create different designs. .
Before comparing the two machines, let us look at the principle of signal transmission: the signal transmission process mainly involves three parts: the transmitting part, the channel and the receiving part. The transmitting end transmits a signal, the channel refers to the frequency band in which the signal is located, and the receiving end is used to receive the signal. Both mobile phones and walkie-talkies have both transmit and receive functions.
Let's take a brief comparison:
The walkie-talkie is a two-way mobile communication tool that can talk without any network support and has no call charges. It is suitable for short-distance calls.
According to different needs, the classification of walkie-talkies is also different: according to their different ways of use, they can be divided into handheld, vehicle-mounted, fixed and relay; according to different communication modes, they can be divided into simplex communication and duplex communication. Interphones; according to different communication services can be divided into public walkie-talkies, digital walkie-talkies, police walkie-talkies, marine walkie-talkies, aviation walkie-talkies and so on. Through the above various application scenarios, the commonality that can be seen is that the function implemented by the walkie-talkie is a specific communication of a specific point to a specific point, and the transmission distance is not very far (such as cross-provincial or global communication).
The function of (mobile) mobile communication is completely different. It requires communication between anyone, anytime, anywhere. This requires the signal to be transmitted over long distances. In the process of signal transmission, the air, buildings, trees, and mountains will weaken the signal quality, thus affecting the transmission distance and the power of the signal transmitting end.
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