Method and apparatus for canceling self-interference in wireless communication system
A method of a UE for canceling a self-interference (SI) signal in a wireless communication system is disclosed. The method comprises the steps of generating a signal related to transmission data by means of a UE operating in a full duplex radio (FDR) mode; transmitting the signal related to transmission data; receiving a signal related to reception data by means of the UE; and canceling the SI signal on the basis of the signal related to transmission data and the signal related to reception data. In this case, a cancellation signal is further generated from the signal related to transmission data on the basis of a previously set value of a power amplifier (PA), and the SI signal is canceled by further reflecting the generated cancellation signal.
1. A method for canceling a self-interference (SI) signal by a user equipment (UE) operating in a full duplex radio (FDR) mode in a wireless communication system, the method comprising:
generating, by the UE, a signal related to transmission data;
transmitting, by the UE, the generated signal;
receiving, the UE, a signal related to reception data;
canceling, by the UE, the SI signal based on the generated signal and the received signal; and
generating, by the UE, a cancellation signal from the generated signal based on a previously set value of a power amplifier (PA),
wherein the SI signal is canceled by reflecting the generated cancellation signal.
2. The method according to claim 1 , wherein the SI signal is canceled in a time domain.
3. The method according to claim 1 , further comprising performing, by the UE, Fast Fourier Transform (FFT) processing for the generated cancellation signal.
4. The method according to claim 3 , wherein the SI signal is canceled in a frequency domain based on the generated cancellation signal for which the FFT processing is performed.
5. The method according to claim 1 , further comprising performing, by the UE, error estimation for the generated cancellation signal.
6. The method according to claim 5 , further comprising updating, by the UE, the cancellation signal based on the error estimation.
7. The method according to claim 1 , wherein the SI cancellation is applied to a multicarrier system.
8. The method according to claim 7 , wherein:
the cancellation signal is generated for each subcarrier of the multicarrier system; and
the SI signal is canceled in a frequency domain based on the cancellation signal generated for each subcarrier.
9. The method according to claim 1 , wherein the previously set value of the power amplifier is given by a datasheet of the PA.
10. The method according to claim 9 , wherein the previously set value of the PA is given based on parameters of the PA.
11. A user equipment (UE) operating in a full duplex radio (FDR) mode and canceling a self-interference (SI) signal in a wireless communication system, the UE comprising:
a reception module configured to receive signals;
a transmission module configured to transmit signals; and
a processor configured to:
generate a signal related to transmission data;
control the transmission module to transmit the generated signal;
control the reception module to receive a signal related to reception data;
cancel the SI signal based on the generated signal and the received signal; and
generate a cancellation signal from the generated signal based on a previously set value of a power amplifier (PA),
wherein the SI signal is canceled by reflecting the generated cancellation signal.
12. The UE according to claim 11 , wherein the SI signal is canceled in a time domain.
13. The UE according to claim 11 , wherein the processor is further configured to perform Fast Fourier Transform (FFT) processing for the generated cancellation signal.
14. The UE according to claim 13 , wherein the SI signal is canceled in a frequency domain based on the generated cancellation signal for which the FFT processing is performed.
15. The UE according to claim 11 , wherein the processor is further configured to perform error estimation for the generated cancellation signal.
16. The UE according to claim 15 , wherein the processor is further configured to update the cancellation signal based of the error estimation.
17. The UE according to claim 11 , wherein the SI cancellation is applied to a multicarrier system.
18. The UE according to claim 17 , wherein:
the cancellation signal is generated for each subcarrier of the multicarrier system; and
the SI signal is canceled in a frequency domain based on the cancellation signal generated for each subcarrier.
19. The UE according to claim 11 , wherein the previously set value of the power amplifier is given by a datasheet of the PA.
20. The UE according to claim 19 , wherein the previously set value of the PA is given based on parameters of the PA.