Method for calibrating a power amplifier and device using the same
View Patent ↗A calibration device for a power amplifier includes a calculation unit, a first storage unit and a multiplier. The calculation unit is utilized for generating a calibration factor according to a value of a characteristic parameter of the power amplifier. The first storage unit coupled to the calculation unit, for storing the calibration factor. The multiplier is coupled to the first storage unit and a baseband unit, for multiplying a baseband signal outputted from the baseband unit by the calibration factor for generating an input signal to the power amplifier.
1. A calibration device for a power amplifier, the calibration device comprising:
a calculation unit, for generating a calibration factor according to a value of a characteristic parameter of the power amplifier and a plurality of lookup tables;
a first storage unit coupled to the calculation unit, for storing the calibration factor;
a second storage unit coupled to the calculation unit, for storing the plurality of lookup tables; and
a multiplier coupled to the first storage unit and a baseband unit, for multiplying a baseband signal outputted from the baseband unit by the calibration factor for generating an input signal to the power amplifier.
2. The calibration device of claim 1 , wherein the calculation unit generates the calibration factor periodically.
3. The calibration device of claim 1 , wherein the calculation unit generates the calibration factor by interpolation according to the plurality of look-up tables stored in the second storage unit.
4. The calibration device of claim 1 , wherein the calculation unit is coupled to a register storing the value of the characteristic parameter.
5. The calibration device of claim 4 , wherein the register is coupled to a measurement unit utilized for measuring the characteristic parameter of the power amplifier.
6. The calibration device of claim 1 , wherein the characteristic parameter is temperature of the power amplifier.
7. The calibration device of claim 1 , wherein the characteristic parameter is gain of the power amplifier.
8. A calibration method for a power amplifier comprising:
generating a calibration factor by using interpolation according to a value of a characteristic parameter of the power amplifier and a plurality of look-up tables;
storing the calibration factor;
multiplying a baseband signal by the calibration factor for generating an input signal; and
outputting the input signal to the power amplifier.
9. The calibration method of claim 8 , further comprising generating the calibration factor periodically.
10. The calibration method of claim 8 , further comprising measuring the characteristic parameter of the power amplifier.
11. The calibration method of claim 8 , further comprising storing the value of the characteristic parameter.
12. The calibration method of claim 8 , wherein the characteristic parameter is temperature of the power amplifier.
13. The calibration method of claim 8 , wherein the characteristic parameter is gain of the power amplifier.