[fundamentals of wireless communication-13]: illustrated mobile communication technology and application development-1-overview

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Preface ：

mobile communication (Mobile communication) It is the communication between mobile bodies , Or the communication between the mobile body and the fixed body .

The mobile body can be human , It can also be a car 、 train 、 ship 、 A moving object, such as a radio .

Mobile communication is a modern technology for wireless communication , This technology is computer and mobile Internet One of the important achievements of development . Mobile communication technology has gone through the first generation 、 Second generation 、 The third generation 、 The development of the fourth generation technology , at present , Has entered the fifth generation of development era (5G Mobile communication technology ), This is also one of the main technologies that change the world at present .

Modern mobile communication technology can be divided into low frequency 、 Intermediate frequency 、 high frequency 、 VHF and UHF frequency bands , Among these frequency bands , Technicians can take advantage of mobile station technology 、 The base station technology 、 Mobile switching technology , Yes Mobile communication network Connect the terminal equipment in , Meet people's mobile communication needs . From analog mobile communication system 、 Digital cellular communication system 、 Mobile multimedia communication system , Up to the present high-speed mobile communication system , The speed of mobile communication technology is increasing , Time delay and Error code The phenomenon is reduced , The stability and reliability of the technology have been continuously improved , It provides a variety of flexible communication methods for people's production and life .

In the last half century , The development of mobile communication is very important to people's life 、 production 、 Work 、 Entertainment and even politics 、 Both economy and culture have had a profound impact ,30 Years ago, a fantasy drone 、 Smart home 、 Network video 、 Online shopping has been realized . Mobile communication technology has experienced analog transmission 、 Digital voice transmission 、 Internet communication 、 Personal communications 、 new generation Wireless mobile communication 5 Stages of development .

The first 1 Chapter Mobile communication Overview

 

 

 

  

  forecast =》 verification

   verification =》 Realization