Bias-voltage-adjustable communications apparatus and communication method

A bias-voltage-adjustable communications apparatus, comprising:

• a radio frequency (RF) part;
• an analog-to-digital converter;
• a digital baseband communications processor;
• a voltage controller;
• a voltage generator;
• wherein the RF part is coupled to the analog-to-digital converter and the voltage controller, the voltage generator is coupled to the analog-to-digital converter and the voltage controller, the analog-to-digital converter is coupled to the digital baseband communications processor, and the communications apparatus is configured to work in an adjustment mode and an operation mode, wherein:
• in the adjustment mode:
• the RF part is configured to generate a single-ended reference signal, wherein the single-ended reference signal comprises a first bias voltage,
• the voltage generator is configured to generate a second bias voltage, and
• the voltage controller is configured to obtain a difference between the first bias voltage and the second bias voltage, and generate a control signal based on the difference for adjusting the first bias voltage or the second bias voltage to decrease the difference;
• and
• in the operation mode:
• the RF part is configured to receive an RF signal, and perform down-conversion on the RF signal to convert the RF signal to a single-ended analog baseband signal, wherein the single-ended analog baseband signal comprises the first bias voltage or the adjusted first bias voltage,
• the voltage generator is configured to generate the second bias voltage or the adjusted second bias voltage,
• the analog-to-digital converter is configured to:
• receive the single-ended analog baseband signal from the RF part,
• receive the second bias voltage or the adjusted second bias voltage from the voltage generator, and
• convert the single-ended analog baseband signal to a digital baseband signal under an action of the second bias voltage or the adjusted second bias voltage;
• and
• the digital baseband communications processor is configured to demodulate the digital baseband signal.