Method and apparatus for performing full duplex radio in wireless communication system
A method of transmitting and receiving a signal at a terminal in a wireless communication system may be provided. A method of, at a terminal, transmitting and receiving a signal may comprise generating a first signal at transmitting end of the terminal and transmitting the generated first signal through an antenna and receiving a second signal through the antenna and transferring the second signal to a receiving end of the terminal. A differential circulator may be provided between the transmitting end and receiving end and the antenna, and the first signal may be transmitted and the second signal may be received at the same time based on the differential circulator.
1 . A method performed by a terminal in a wireless communication system, the method comprising:
generating a first signal at a transmitting end of the terminal;
transmitting the first signal through an antenna;
receiving a second signal through the antenna; and
transferring the second signal to a receiving end of the terminal,
wherein the first signal and the second signal pass through a differential circulator within a time interval, and
wherein the differential circulator comprises two double pole double throw (DPDT) switches, two single pole double throw (SPDT) switches and at least one sequentially switched delay line (SSDL).
2 . The method of claim 1 , wherein the first signal is transferred to each of the two DPDT switches.
3 . The method of claim 1 , wherein the at least one SSDL is configured between the two DPDT switches and the two SPDT switches.
4 . The method of claim 3 , wherein the at least one SSDL is configured based on a magnetically coupled inductor.
5 . The method of claim 4 , wherein each of the two DPDT switches comprises two input terminals and two output terminals, and
wherein the two input terminals of each of the two DPDT switches are respectively connected to the transmitting end and the receiving end, and the two output terminals of each of the two DPDT switches are connected to the at least one SSDL configured based on the magnetically coupled inductor.
6 . The method of claim 5 , wherein each of the two SPDT switches comprises one input terminal and two output terminals,
wherein the two output terminals of each of the two SPDT switches are connected to the at least one SSDL configured based on the magnetically coupled inductor, and
wherein the input terminal of each of the two SPDT switches is connected to the antenna.
7 . The method of claim 6 , wherein each of the two SPDT switches is switched from a first output terminal to a second output terminal at a first timing.
8 . The method of claim 7 , wherein each of the two input terminals of each of the two DPDT switches is switched from a first input terminal to a second input terminal at a second timing later than the first timing.
9 . The method of claim 8 , wherein each of the two SPDT switches is switched from the second output terminal to the first output terminal at a third timing later than the second timing.
10 . The method of claim 9 , wherein each of the two input terminals of each of the two DPDT switches is switched from the second input terminal to the first input terminal at a fourth timing later than the third timing.
11 . The method of claim 4 ,
wherein the first signal generated at the transmitting end is generated based on a first frequency, and
wherein the first signal based on the first frequency passes through the two DPDT switches and then passes through the at least one SSDL based on a signal with a mixed frequency component, and when the signal with the mixed frequency component passes through the two SPDP switches, the first signal based on the first frequency is restored.
12 . The method of claim 4 ,
wherein the at least one SSDL configured based on the magnetically coupled inductor comprises a direct capacitor and a cross capacitor, and
wherein the direct capacitor has a frequency at which a delay of a delay line increases, and the cross capacitor has a frequency at which the delay of the delay line decreases.
13 . A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a processor connected to the transceiver,
wherein the processor is configured to:
generate a first signal at a transmitting end of the terminal;
transmit the first signal through an antenna;
receive a second signal through the antenna; and
transfer the second signal to a receiving end of the terminal,
wherein the first signal and the second signal pass through a differential circulator within a time interval, and
wherein the differential circulator comprises two double pole double throw (DPDT) switches, two single pole double throw (SPDT) switches and at least one sequentially switched delay line (SSDL).
14 . A base station in a wireless communication system, the base station comprising:
a transceiver; and
a processor connected to the transceiver,
wherein the processor is configured to:
generate a first signal at a transmitting end of the base station,
transmit the first signal through an antenna,
receive a second signal through the antenna, and
transfer the second signal to a receiving end of the base station,
wherein the first signal and the second signal pass through a differential circulator within a time interval, and
wherein the differential circulator comprises two double pole double throw (DPDT) switches, two single pole double throw (SPDT) switches and at least one sequentially switched delay line (SSDL).