Power control for non-constant envelope modulation
AssigneeNokia Corporation
InventorsSarachi Mohsen, Tim Land
Life of this patent
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Abstract
There is disclosed a method and apparatus for control of a power control loop. The method comprises the steps of: amplifying a non-constant envelope modulation signal to thereby produce an output signal; combining a power level control signal with a signal representing the envelop of modulation; comparing the combined signal to a signal representing the power level of the output signal to thereby produce a comparison signal; and attenuating the amplified signal in dependence on said comparison signal.
Claims12
A method of control in a power control loop, comprising the steps of:
- amplifying a non-constant envelope modulation signal to thereby produce an output signal;
- combining a power level control signal with a signal representing the envelop of modulation;
- comparing the combined signal to a signal representing the power level of the output signal to thereby produce a comparison signal;
- and attenuating the amplified signal in dependence on said comparison signal.
A method of control in a power control loop, comprising the steps of:
- ramping up an output signal during a first cycle;
- and maintaining a substantially constant output signal during a second cycle, wherein in said first and second cycles the method further comprises:
- amplifying a non-constant envelope modulation signal to thereby produce the output signal;
- combining a power level control signal with a signal representing the envelop of modulation;
- comparing the combined signal to a signal representing the power level of the output signal to thereby produce a comparison signal;
- and attenuating the amplified signal in dependence on said comparison signal.
A power control loop, comprising:
- an amplifier for amplifying a non-constant envelop modulation signal to thereby produce an output signal;
- a combiner for combining a power level control signal with a signal representing the envelop of modulation;
- a comparator for comparing the combined signal to a signal representing the power level of the output signal to thereby produce a comparison signal;
- and an attenuator for attenuating the signal to be amplified in dependence on said comparison signal.
Dependencies are inferred from the claim text.