Electronic device and signal compensation method

Abstract

This invention discloses an electronic device and a signal compensation method. The signal compensation method is applied to an electronic device. The electronic device includes a transmitted signal strength indication circuit and a temperature sensing circuit. The electronic device generates a digital output signal and up-amplifies the digital output signal to generate an output signal. The method includes: obtaining a signal strength of the output signal from the transmitted signal strength indication circuit; obtaining temperature information from the temperature sensing circuit; setting a target gain based on the signal strength and the temperature information; and adjusting the amplitude of the digital output signal based on the target gain.

Claims

1. An electronic device comprising: a power amplifier for amplifying a radio frequency signal to generate an output signal; a transmit signal strength indication circuit coupled to the power amplifier for generating a signal strength of the output signal; and a communication circuit coupled to the power amplifier and the transmit signal strength indication circuit, comprising: a temperature sensing circuit for generating temperature information; a digital baseband circuit coupled to the temperature sensing circuit for generating a digital output signal and setting a target gain based on the signal strength and the temperature information; a gain control circuit coupled to the digital baseband circuit for adjusting the amplitude of the digital output signal according to the target gain; and a transmission terminal circuit coupled to the gain control circuit for converting the digital output signal into the radio frequency signal; wherein... The digital baseband circuit performs the following steps: calculates a value based on the signal strength and the temperature information; determines a plurality of candidate gains from a lookup table based on the value, wherein the plurality of candidate gains correspond to a plurality of time intervals; and during the transmission of the digital output signal, selects one of the plurality of candidate gains to set the target gain based on a current time interval of the digital output signal.

2. The electronic device as claimed in claim 1, wherein, The target gain increases as the current time interval increases.

3. The electronic device as claimed in claim 1, wherein, The lookup table contains a plurality of ranges, the value of which falls within a target range, and the plurality of candidate gains corresponding to the target range.

4. The electronic device as claimed in claim 1, wherein, The lookup table includes a first range and a second range, the first range corresponding to a plurality of first candidate gains, the second range corresponding to a plurality of second candidate gains, a first average value of the plurality of first candidate gains being less than a second average value of the plurality of second candidate gains, and a lower limit of the second range being greater than or equal to an upper limit of the first range.

5. A signal compensation method applied to an electronic device, the electronic device including a transmit signal strength indication circuit and a temperature sensing circuit, the electronic device generating a digital output signal and upsampling and amplifying the digital output signal to generate an output signal, the method comprising: obtaining a signal strength of the output signal from the transmit signal strength indication circuit; obtaining temperature information from the temperature sensing circuit; setting a target gain based on the signal strength and the temperature information; and adjusting the amplitude of the digital output signal based on the target gain; wherein, The step of setting the target gain based on the signal strength and the temperature information includes: calculating a value based on the signal strength and the temperature information; determining a plurality of candidate gains from a lookup table based on the value, wherein the plurality of candidate gains correspond to a plurality of time intervals; and during the transmission of the digital output signal, selecting one of the plurality of candidate gains to set the target gain based on a current time interval of the digital output signal.

6. As in request item 5, wherein, The target gain increases as the current time interval increases.

7. As in request item 5, wherein, The lookup table contains a plurality of ranges, the value of which falls within a target range, and the plurality of candidate gains corresponding to the target range.

8. As in request item 5, wherein, The lookup table includes a first range and a second range, the first range corresponding to a plurality of first candidate gains, the second range corresponding to a plurality of second candidate gains, a first average value of the plurality of first candidate gains being less than a second average value of the plurality of second candidate gains, and a lower limit of the second range being greater than or equal to an upper limit of the first range.

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