Transceiving device and calibration method thereof

1. A transceiving device, comprising:

a calibration signal generation unit, configured to generate an in-phase test signal and a quadrature test signal in a calibration mode;

a phase adjusting unit, configured to adjust the in-phase test signal and the quadrature test signal to generate an adjusted in-phase test signal and an adjusted quadrature test signal according to a phase controlling signal;

a transmission unit, configured to generate a radio frequency signal according to the adjusted in-phase test signal and the adjusted quadrature test signal;

a receiving unit, configured to receive the radio frequency signal so as to generate an in-phase receiving signal and a quadrature receiving signal; and

a calibration unit, configured to generate the phase controlling signal according to the in-phase receiving signal, the quadrature receiving signal, the in-phase test signal, and the quadrature test signal.

2. The transceiving device of claim 1 , wherein the calibration unit is configured to obtain a first phase difference of the in-phase receiving signal and the quadrature receiving signal with respect to the in-phase test signal and the quadrature test signal, and generate the phase controlling signal according to the first phase difference.

3. The transceiving device of claim 2 , wherein the phase controlling signal causes the adjusted in-phase test signal and the adjusted quadrature test signal to have a second phase difference with respect to the in-phase test signal and the quadrature test signal, and the second phase difference is a negative value of the first phase difference.

4. The transceiving device of claim 2 , wherein the phase controlling signal includes an in-phase phase controlling signal and a quadrature phase controlling signal.

5. The transceiving device of claim 1 , wherein the in-phase test signal and the quadrature test signal are respectively a real part signal and an imaginary part signal of a test complex signal, wherein the phase adjustment unit is configured to perform a multiplication operation to obtain an adjusted complex signal according to the test complex signal and the phase controlling signal, wherein the adjusted in-phase test signal and the adjusted quadrature test signal are respectively a real part signal and an imaginary part signal of the adjusted complex signal.

6. The transceiving device of claim 1 , wherein the in-phase test signal is 1, and the quadrature test signal is 0.

7. The transceiving device of claim 1 , wherein the transmission unit comprises:

a first digital-to-analog converter, configured to perform digital-to-analog conversion on the adjusted in-phase test signal to generate a first analog signal;

a first filter, configured to filter the first analog signal to generate a first shaped signal; and

a first upconverter, configured to upconvert the first shaped signal to generate a first upconverted signal.

8. The transceiving device of claim 7 , wherein the transmission unit further comprises:

a second digital-to-analog converter, configured to perform digital-to-analog conversion on the adjusted quadrature test signal to generate a second analog signal;

a second filter, configured to filter the second analog signal to generate a second shaped signal;

a second upconverter, configured to upconvert the second shaped signal to generate a second upconverted signal; and

a combiner, configured to combine the first upconverted signal and the second upconverted signal as a combined signal.

9. The transceiving device of claim 8 , wherein the transmission unit further comprises:

a power amplifier, configured to adjust the combined signal to generate the radio frequency signal according to a power gain value.

10. The transceiving device of claim 1 , wherein the receiving unit comprises:

an attenuator, configured to attenuate the radio frequency signal to generate an attenuated signal;

a first downconverter, configured to downconvert the attenuated signal to generate a first downconverted signal;

a second downconverter, configured to downconvert the attenuated signal to generate a second downconverted signal;

a first gain controller, configured to adjust the first downconverted signal to generate a first post-gain signal according to a first gain value;

a second gain controller, configured to adjust the second downconverted signal to generate a second post-gain signal according to a second gain value;

a first analog-to-digital converter, configured to perform analog-to-digital conversion on the first post-gain signal to generate the in-phase receiving signal; and

a second analog-to-digital converter, configured to perform analog-to-digital conversion on the second post-gain signal to generate the quadrature receiving signal.

11. A method for calibrating a transceiving device, comprising:

generating an in-phase test signal and a quadrature test signal;

adjusting the in-phase test signal and the quadrature test signal to generate an adjusted in-phase test signal and an adjusted quadrature test signal according to a phase controlling signal;

generating a radio frequency signal according to the adjusted in-phase test signal and the adjusted quadrature test signal;

receiving the radio frequency signal so as to generate an in-phase receiving signal and a quadrature receiving signal; and

generating the phase controlling signal according to the in-phase receiving signal, the quadrature receiving signal, the in-phase test signal, and the quadrature test signal.

12. The method of claim 11 , wherein the step of generating the phase controlling signal according to the in-phase receiving signal, the quadrature receiving signal, the in-phase test signal, and the quadrature test signal comprises:

obtaining a first phase difference of the in-phase receiving signal and the quadrature receiving signal with respect to the in-phase test signal and the quadrature test signal; and

generating the phase controlling signal according to the first phase difference.

13. The method of claim 12 , wherein the phase controlling signal causes the adjusted in-phase test signal and the adjusted quadrature test signal to have a second phase difference with respect to the in-phase test signal and the quadrature test signal, wherein the second phase difference is a negative value of the first phase difference.

14. The method of claim 12 , wherein the step of generating the phase controlling signal according to the first phase difference comprises:

generating an in-phase phase controlling signal; and

generating a quadrature phase controlling signal.

15. The method of claim 11 , wherein the in-phase test signal and the quadrature test signal are respectively a real part signal and an imaginary part signal of a test complex signal, wherein the step of generating the adjusted in-phase test signal and the adjusted quadrature test signal according to the phase controlling signal to adjust the in-phase test signal and the quadrature test signal comprises:

performing a multiplication operation to obtain an adjusted complex signal according to the test complex signal and the phase controlling signal, wherein the adjusted in-phase test signal and the adjusted quadrature test signal are respectively a real part signal and an imaginary part signal of the adjusted complex signal.

16. The method of claim 11 , wherein the in-phase test signal is 1, and the quadrature test signal is 0.

17. The method of claim 11 , wherein the step of generating the radio frequency signal according to the adjusted in-phase test signal and the adjusted quadrature test signal comprises:

performing digital-to-analog conversion on the adjusted in-phase test signal to generate a first analog signal;

filtering the first analog signal to generate a first shaped signal; and

upconverting the first shaped signal to generate a first upconverted signal.

18. The method of claim 17 , wherein the step of generating the radio frequency signal according to the adjusted in-phase test signal and the adjusted quadrature test signal further comprises:

performing digital-to-analog conversion on the adjusted quadrature test signal to generate a second analog signal;

filtering the second analog signal to generate a second shaped signal;

upconverting second shaped signal to generate a second upconverted signal;

combining the first upconverted signal and the second upconverted signal as a combined signal; and

adjusting the combined signal to generate the radio frequency signal according to a power gain value.

19. The method of claim 11 , wherein the step of receiving the radio frequency signal so as to generate the in-phase receiving signal and the quadrature receiving signal comprises:

attenuating the radio frequency signal to generate an attenuated signal;

downconverting the attenuated signal to generate a first downconverted signal;

adjusting the first downconvert signal to generate a first post-gain signal according to a gain value; and

performing analog-to-digital conversion on the first post-gain signal to generate the in-phase receiving signal.

20. The method of claim 19 , wherein the step of receiving the radio frequency signal so as to generate the in-phase receiving signal and the quadrature receiving signal further comprises:

downconverting the attenuated signal to generate a second downconverted signal;

adjusting the second downconverted signal to generate a second post-gain signal according to the gain value; and

performing analog-to-digital conversion on the second post-gain signal to generate the quadrature receiving signal.