for example :
Sender: A cellular signal tower(Base Station(BS)) sends data(voice, GPRS, VOIP) to the cellphone. The sender will obviously have the carrier frequency and more power(voltage+current) to generate the carrier signal.
Receiver: A cell phone which receives the data signal (voice, GPRS, VOIP) from the BS. This requires less energy because the cell phone is receiving data.
I want to know, when the receiver sends data(voice,GPRS,VOIP) to the BS, how does it do this?
Does the cell phone generate it's own carrier signal?
If yes, then how can a 3.7 volt battery be available for 8-12 hours?
The receiver's signal goes on to same carrier signal which is generated by the BS.
If yes, How? Does the carrier signal use refraction/reflation properties to send data back to BS?