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[S^3]

Gone through Cellphone Tower Radiation Article.
Real wealth of information in simple terms.
A small querry :
Cellphone adjusts output power based on tower distance. How?

1. Open loop .. cellphone blindly increase output if Rx signal is weakened

OR

2. Does cellphone transmit a beacon and tower measures it and gives a feedback to cellphone to control the output?

Second scenario seems to be practically impossible because the tower will have to have a complex processing to identify each phone.

Actually the question has come to mind because someone has suggested a simple ( !! ) solution of reducing the tower output to overcome Radiation threat.

[admin]

The cell tower tells the mobile phone what power level to output (max power to min), it is part of the handshake.

What radiation threat are you referring to?

[S^3]

Thanks Admin.

That means the tower sends the requirement of TX level to each phone.

There are several protests ( I have no idea of US , but in India ) to reduce the Tx power from towers to reduce the radiation risk for people residing nearby.

I was under the impression that if tower transmits less power then the Cellphone will assume that the tower is far off and will transmit more power ( as per some sort of look up table ) which is more severe radiation exposure than the received tower signal.

Anyway thanks again for the clarification.