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S^3 Antenna-Theory.com Newbie
Joined: 01 Apr 2016 Posts: 5 Location: Dallas, Tx
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Posted: Fri Apr 01, 2016 3:43 am Post subject: Cellphone Transmit power |
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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. |
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admin Site Admin
Joined: 03 Jan 2007 Posts: 201
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Posted: Mon Apr 04, 2016 3:45 am Post subject: |
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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? |
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S^3 Antenna-Theory.com Newbie
Joined: 01 Apr 2016 Posts: 5 Location: Dallas, Tx
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Posted: Mon Apr 04, 2016 7:53 pm Post subject: |
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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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