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How does mobile phones communicate wirelessly ?

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awan

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wireless communication

plese tell me how mobiles communicate wirelssly
 

wireless communication

Hello awan,

mobile communicatin is too complex to illustrated in a page, but there are some intuitive ideas.

1, Armstrong's Superregenerator archtecture is widely used in mobile region and form the basic radio mixers,

2, the signal from the antanna should be processed to lots of different amplifiers, e.g. low noise amplifier(the first stage) power amplifier (the last stage)

3, noise besides the signal in mobile is more than the noise we got from phone line or optical fiber, so the noise should be considered

4, play with a real radio and see how it works will be helpful

Cheers,

Davy Zhu
 

Re: wireless communication

Hi...
mobile communication is nothing but wireless comuunication with high frequency band.. and frequency resuse technique....

for detail go thru this site...
**broken link removed**

reply if u need any help..
jay
 

Re: wireless communication

and i think the working frequency is around 800-900 MHz
 

Re: wireless communication

it depends. there are frequency used by different wireless application. Even for GSM, as I know , it can be used in 800-900MHz or 1800~1900MHz. For 3G, it is other things. Frequency is often allocation by goverment or authority organization!
 

Re: wireless communication

Probably you are referring to cellular communications.
The service area is divided into "cells". Each cell is centered by a Base Station. Each mobile unit communicate with the base station where it exists. When a mobile stations moves from one cell to another cell, a "handoff" process is performed, where the communication is transferred to the next base station.

There are many books about cellular mobile communications. Just search the internet for "cellular mobile communications". There are also many university lecture notes.
 

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