移动通信杆塔
themobilecommunication
yunhuiwu200830800224
themobilecommunicationiskindofcommunicationbetweenthemobilebody,orbetweenmobilebodyandfixedbody.mobilebodycanbepeople,alsocanbemovingobjectslikethecars,trains,ships,radioandsoon。
mobilecommunicationsconsistsoftwoparts:spacesystemsandgroundsystem:mobilesatelliteradioandantennas;gateways,basestations
thedevelopmentofmobilecommunicationtechnology
thefirstgenerationofmobilecommunicationisgivenprioritytosimulationtechnology,onlyprovidesthevoicebusiness,nointernationalstandard;
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