Apparatus and method for power supply modulation
AssigneeNokia Technologies Oy
InventorZhancang WANG
Life of this patent
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Abstract
Embodiments of the invention provide an apparatus for amplifying a radio frequency transmission signal, comprising: an envelope signal obtaining unit (210) configured to obtain a slow envelope signal indicating a time averaging amplitude component of the radio frequency signal and a fast envelope signal indicating an instant amplitude component of the radio frequency signal; a supply voltage modulating unit (230) configured to provide an output modulated supply voltage to the power amplifying unit by modulating a direct current supply voltage based on both the slow envelope signal and the fast envelope signal; and a power amplifying unit (220) configured to amplify power of the radio frequency transmission signal according to the output modulated supply voltage.
Claims20
1-26. (canceled)
An apparatus for amplifying an radio frequency transmission signal, comprising:
- an envelope signal obtaining unit configured to obtain a slow envelope signal indicating a time averaging amplitude component of the radio frequency transmission signal and a fast envelope signal indicating an instant amplitude component of the radio frequency transmission signal;
- a supply voltage modulating unit configured to provide an output modulated supply voltage to the power amplifying unit by modulating a direct current supply voltage based on both the synchronous slow envelope signal and the fast envelope signal;
- and
- a power amplifying unit configured to amplify power of the radio frequency transmission signal according to the output modulated supply voltage.
A device for supply voltage modulating, comprising:
- a first input port for receiving a slow envelope signal indicating a time averaging amplitude component of a radio frequency transmission signal;
- a second input port for receiving a fast envelope signal indicating an instant amplitude component of the radio frequency transmission signal;
- an output port for outputting an output modulated supply voltage;
- and
- a supply voltage modulating unit configured to provide the output modulated supply voltage by modulating a direct current supply voltage synchronously based on both the slow envelope signal and the fast envelope signal.
A method for supply voltage modulating, comprising:
- receiving a slow envelope signal indicating a time averaging amplitude component of the radio frequency signal and a fast envelope signal indicating an instant amplitude component of the radio frequency signal;
- and
- providing an output modulated supply voltage by modulating a direct current supply voltage based on both the slow envelope signal and the fast envelope signal.
Dependencies are inferred from the claim text.