Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Patent
1995-04-28
1998-03-24
Pham, Chi H.
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
455571, 455572, 455129, H04Q 732
Patent
active
057323356
ABSTRACT:
A system and method are provided for controlling the output power from a mobile station based on the type of antenna used. The system and method detects whether the antenna is a type which is directly attached to an acoustic transducer for speech of the mobile station and controls the output transmission power based on this detection to conform with GSM requirements. More particularly, if the antenna is detected to be directly attached to the acoustic transducer for speech, and thereby to the hand set of the mobile station, the maximum output power of the mobile station is Class 4 or 5, which corresponds to 2.0 watts or 0.8 watts respectively, in order to comply with the GSM requirements. However, if the antenna of the mobile station is not detected to be directly attached to the acoustic transducer for speech, a higher maximum output power of the mobile station of Class 2 or 3, which corresponds to 5.0 watts or 8.0 watts respectively, is used by determining that an externally connected antenna is being used by the mobile station. As a result, the system and method controls the output power of the mobile station to conform with the GSM requirements for the output power at a high accuracy.
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Pham Chi H.
Telefonaktiebolaget LM Ericsson
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