Devices for controlling amplification of a signal emitted by a mobile terminal and increasing the autonomy of the mobile terminal
View Patent ↗Radiocommunication terminals are disclosed. A radiocommunication terminal includes a power supply, a power amplifier configured to receive and amplify a signal using power drawn from the power supply, and a control unit configured to control the power amplifier to amplify the signal by an amount of amplification based on a requested amount of amplification and a level of a voltage provided on an output terminal of the power supply.
1. A radiocommunication terminal comprising:
a power supply;
a power amplifier configured to receive and amplify a signal using power drawn from the power supply; and
a control unit configured to control the power amplifier to amplify the signal by an amount of amplification based on a requested amount of amplification and a level of a voltage provided on an output terminal of the power supply,
the requested amount of amplification being based on a quality of a transmitted signal from the radiocommunication terminal.
2. A radiocommunication terminal comprising:
a power supply;
a power amplifier configured to receive and amplify a signal using power drawn from the power supply;
a control unit configured to control the power amplifier to amplify the signal by an amount of amplification based on a requested amount of amplification and a level of a voltage provided on an output terminal of the power supply;
a detector unit configured to determine a level of the signal amplified by the power amplifier; and
a subtractor unit configured to determine the amount of amplification, at least in part, by subtracting from the level of the signal amplified by the power amplifier a value dependent on the level of the voltage provided on the output terminal of the power supply.
3. The radiocommunication terminal of claim 2 , wherein the subtractor unit is configured to determine the amount of amplification, at least in part, by providing a calculated voltage determined by subtracting from the level of the signal amplified by the power amplifier a value determined by multiplying a positive multiplier coefficient (K) by a difference between the voltage provided on the output terminal of the power supply and a nominal voltage of the power supply.
4. The radiocommunication terminal of claim 3 , further comprising a comparator configured to determine a difference between the calculated voltage and a reference voltage and to provide to the control unit a signal indicating the difference, the control unit being further configured to use the signal indicating the difference to control the power amplifier to amplify the signal by the amount of amplification.
5. A radiocommunication terminal comprising:
a power supply;
a power amplifier configured to receive and amplify a signal using power drawn from the power supply;
a detector unit configured to determine a level of the signal amplified by the power amplifier;
a comparator configured to provide an output signal based at least in part on one of the determined level of the signal and an adjusted level depending on the determined level of the signal amplified by the power amplifier; and
a control unit configured to provide a control signal to adjust a level of amplification of the power amplifier based on the signal provided by the comparator,
wherein the output signal from the comparator represents a difference between the one of the determined level of the signal and the adjusted level and a reference voltage.
6. A radiocommunication terminal comprising:
a power supply;
a power amplifier configured to receive and amplify a signal using power drawn from the power supply;
a detector unit configured to determine a level of the signal amplified by the power amplifier;
a comparator configured to provide an output signal based at least in part on one of the determined level of the signal and an adjusted level depending on the determined level of the signal amplified by the power amplifier;
a control unit configured to provide a control signal to adjust a level of amplification of the power amplifier based on the signal provided by the comparator; and
a battery voltage allowance unit configured to provide the one of the detected voltage and the adjusted voltage to the comparator depending on the determined level of the signal amplified by the power amplifier.
7. The radiocommunication terminal of claim 6 , wherein the battery voltage allowance unit comprises a subtractor and a blocking unit, the subtractor being configured to subtract an amount based on a function of the level of a voltage provided on an output terminal of the power supply from the detected voltage, and the blocking unit being configured to prevent the subtractor from subtracting the amount based on the function of the level of the voltage provided on the output terminal of the power supply from the detected voltage when the level of the signal amplified by the power amplifier is greater than a predetermined voltage level.
8. The radiocommunication terminal of claim 7 , wherein the blocking unit is a field effect transistor.
9. The radiocommunication terminal of claim 7 , wherein the subtractor is configured to provide an output signal according to the equation (v′det)=(vdet)−K(Vbat−Vnom), where (vdet) is the level of the signal amplified by the power amplifier, K is a positive multiplier coefficient, (Vbat) is the voltage provided on the output terminal of the power supply and (Vnom) is a nominal voltage rating of the power supply.
10. A radiocommunication terminal comprising:
a power supply;
a power amplifier configured to receive and amplify a signal using power drawn from the power supply;
a detector unit configured to determine a level of the signal amplified by the power amplifier;
a reference voltage generating unit configured to establish a reference voltage as a function of the level of the signal amplified by the power amplifier and a level of a voltage provided on an output terminal of the power supply when the level of the signal amplified by the power amplifier is greater than a predetermined amount;
a comparator configured to provide a signal representing a difference between the level of the signal amplified by the power amplifier and the reference voltage; and
a control unit configured to provide a control signal to adjust a level of amplification of the power amplifier based on the signal provided by the comparator.
11. The radiocommunication terminal of claim 10 , wherein when the level of the signal amplified by the power amplifier is greater than a predetermined level, the reference voltage generating unit is configured to establish the reference voltage according to the function (Vref′)=(Vref)+K′(Vbat−Vnom), wherein (Vref′) is the established reference voltage, (Vref) is a set point voltage when the level of the signal amplified by the power amplifier is less than the predetermined level, K′ is a positive multiplier coefficient, (Vbat) is the level of the voltage provided on the output terminal of the power supply, and (Vnom) is the nominal voltage rating of the power supply.
12. The radiocommunication terminal of claim 10 , wherein when the level of the signal amplified by the power amplifier is less than a predetermined level, the reference voltage generating unit establishes the reference voltage without accounting for the level of the voltage provided on the output terminal of the power supply.
13. The radiocommunication terminal of claim 10 , wherein the reference voltage generating unit is a tangible computer readable medium containing software configured to establish the reference voltage.