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US 11,082,073 B2Granted
Method and controller for controlling power amplifier in radio transmitter as well as radio unit and radio device
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsYang Zhang, Peng Liu, Qiaoyu Li
Life of this patent
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Abstract
Method and controller are disclosed for controlling a power amplifier in a radio transmitter. According to an embodiment, a nonlinearity of the power amplifier is determined. A supply voltage to the power amplifier is controlled based on the determined nonlinearity. A radio unit comprising the radio transmitter and a radio device comprising the radio unit are also disclosed.
Claims13
A method for controlling a power amplifier (PA) in a radio transmitter, comprising:
- determining a nonlinearity of the PA;
- and
- controlling a supply voltage to the PA based on the determined nonlinearity, wherein the step of controlling comprises:
- comparing the determined nonlinearity with a first threshold and a second threshold;
- decreasing the supply voltage in response to a comparison result that the determined nonlinearity is smaller than the first threshold;
- keeping the supply voltage unchanged in response to a comparison result that the determined nonlinearity is greater than or equal to the first threshold and smaller than the second threshold;
- and
- increasing the supply voltage in response to a comparison result that the determined nonlinearity is greater than or equal to the second threshold.
5 more elements
A controller for controlling a power amplifier (PA) in a radio transmitter, comprising:
- a processor;
- and
- a memory, the memory containing instructions executable by the processor, whereby the controller is operative to:
- determine a nonlinearity of the PA;
- and
- control a supply voltage to the PA based on the determined nonlinearity, where the instructions are executable by the processor, whereby the controller is operative to perform the step of controlling by:
- comparing the determined nonlinearity with a first threshold and a second threshold;
- decreasing the supply voltage in response to a comparison result that the determined nonlinearity is smaller than the first threshold;
- keeping the supply voltage unchanged in response to a comparison result that the determined nonlinearity is greater than or equal to the first threshold and smaller than the second threshold;
- and
- increasing the supply voltage in response to a comparison result that the determined nonlinearity is greater than or equal to the second threshold.
8 more elements
A radio transmitter comprising:
- a power amplifier (PA);
- a direct current (DC) converter configured to apply a supply voltage to the PA;
- a PA monitor configured to monitor an output from the PA;
- a digital component configured to determine a correction value based on a feedback from the PA monitor and apply the correction value to an input signal to compensate for a nonlinearity of the PA;
- a digital to analog converter (DAC) configured to convert the corrected input signal to an analog signal;
- an analog component configured to perform up-conversion on the analog signal for subsequent amplification by the PA;
- and
- a controller configured to:
- determine the nonlinearity of the PA;
- and
- control the supply voltage to the PA based on the determined nonlinearity, where the controller is configured to perform the step of controlling by being configured to:
- compare the determined nonlinearity with a first threshold and a second threshold;
- decrease the supply voltage in response to a comparison result that the determined nonlinearity is smaller than the first threshold;
- keep the supply voltage unchanged in response to a comparison result that the determined nonlinearity is greater than or equal to the first threshold and smaller than the second threshold;
- and
- increase the supply voltage in response to a comparison result that the determined nonlinearity is greater than or equal to the second threshold.
13 more elements
Dependencies are inferred from the claim text.