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S^3
Antenna-Theory.com Newbie

Joined: 01 Apr 2016
Posts: 5
Location: Dallas, Tx

 Posted: Fri Apr 01, 2016 3:43 am    Post subject: Cellphone Transmit power 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.

Joined: 03 Jan 2007
Posts: 210

 Posted: Mon Apr 04, 2016 3:45 am    Post subject: 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
Antenna-Theory.com Newbie

Joined: 01 Apr 2016
Posts: 5
Location: Dallas, Tx

 Posted: Mon Apr 04, 2016 7:53 pm    Post subject: 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.
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