Transceiver and transceiver calibration method

A transceiver, comprising:

• a calibration signal generation unit, configured to generate a first test signal and a second test signal to a transmission unit in a gain calibration mode;
• the transmission unit, configured to generate a combined signal according to the first test signal, the second test signal and a transmission gain, wherein the transmission unit includes:
• a first digital-to-analog converter, configured to perform digital-to-analog conversion to the first test signal to obtain a first analog signal;
• a second digital-to-analog converter, configured to perform digital-to-analog conversion to the second test signal to obtain a second analog signal;
• a first transmission gain unit, configured to provide a gain to the first analog signal according to the transmission gain so as to generate a first post-gain signal;
• a second transmission gain unit, configured to provide a gain to the second analog signal according to the transmission gain so as to generate a second post-gain signal;
• a self-mixer, configured to perform self-mixing to the combined signal to generate a self-mixing signal;
• a receiving unit, configured to generate a receiving signal according to the self-mixing signal;
• a first Fourier transformer, configured to calculate a power of the receiving signal at a specific frequency;
• and
• a gain calibration unit, configured to adjust the transmission gain according to the power of the specific frequency in the gain calibration mode.