PA gain state switching based on waveform linearity
AssigneeQUALCOMM Incorporated
InventorsSumit Verma, Vijay K. Chellappa, Gurkanwal S. Sahota
Life of this patent
Estimating the term…
Abstract
Techniques for optimizing the power consumption of existing low cost multi-gain state power amplifiers (PA) to increase the talk time of wireless communication devices are described. In an exemplary embodiment a device, such as a baseband processor, operates to set a multistage PA having at least two gain states for amplifying a transmit signal to a lowest power consuming gain state. The device calculates a transition power level as a function of an identified maximum power reduction (MPR) value and switches the PA to a higher gain state from a lower gain state when a transmission power level is higher than the calculated transition power level.
Claims27
A device for controlling a multi-gain state power amplifier (PA) having at least two power paths with respective gain states for amplifying a transmit signal, comprising:
- an MPR module to calculate a transition power level between a lower gain state and a higher gain state of different power paths as a function of a maximum power reduction (MPR) value associated with the transmit signal;
- and
- a PA gain controller to switch the PA to the higher gain state from the lower gain state when a transmission power level is higher than the transition power level.
An integrated circuit (IC) for controlling a multi-gain state power amplifier (PA) having at least two power paths with respective gain states for amplifying a transmit signal, the IC comprising:
- an MPR module to calculate a transition power level between different PA gain states of different respective power paths as a function of an MPR value associated with the transmit signal;
- and
- a PA gain controller to switch the PA to a higher gain state from a lower gain state when a transmission power level is higher than the transition power level.
A device for controlling a multi-gain state PA having at least two power paths with respective gain states for amplifying a transmit signal comprising:
- means for calculating a transition power level between different gain states of different respective power paths as a function of an identified MPR value;
- and
- means for switching the PA to a higher gain state from a lower gain state when a transmission power level is higher than the calculated transition power level.
A device for controlling a multi-gain state PA having at least two gain states for amplifying a transmit signal comprising:
- means for identifying a waveform bin, from a plurality of MPR bins, associated with an identified waveform linearity characteristic;
- means for identifying an MPR value associated with the identified waveform bin;
- means for calculating a transition power level as a function of the identified MPR value;
- and
- means for switching the PA to a higher gain state from a lower gain state when a transmission power level is higher than the calculated transition power level.
A method of controlling a multi-gain state PA having at least two power paths with respective gain states for amplifying a transmit signal, comprising:
- calculating a transition power level between different gain states of different respective power paths as a function of an identified MPR value;
- and
- switching the PA to a higher gain state from a lower gain state when a transmission power level is higher than the calculated transition power level.
A method of controlling a multi-gain state PA having at least two gain states for amplifying a transmit signal, comprising:
- identifying a waveform bin from a plurality of waveform bins associated with an identified waveform linearity characteristic;
- identifying an MPR value associated with the identified waveform bin;
- calculating a transition power level as a function of the identified MPR value;
- and
- switching the PA to a higher gain state from a lower gain state when a transmission power level is higher than the calculated transition power level.
A computer program product for use with a processor device that controls a multistage PA having at least two power paths with respective gain states for amplifying a transmit signal, the computer program product having instructions to cause the processor device to:
- calculate a transition power level between different gain states of different respective power paths as a function of an identified MPR value;
- and
- switch the PA to a higher gain state from a lower gain state when a transmission power level is higher than the calculated transition power level.
Dependencies are inferred from the claim text.