METHOD FOR TRANSCEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR

• US 20150326269A1
• Filed: 12/02/2013
• Published: 11/12/2015
• Est. Priority Date: 12/11/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KO, Hyunsoo, KIM, Jinmin, CHUNG, Jaehoon
• Granted Patent: US 9,584,294 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/2621 using frequency division multiple access [FDMA] H04B7/2615 takes precedence
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04J 2011/0096 Network synchronisation
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
• CPC Class Codes: H04W 56/001 Synchronization between nodes

Abstract

The present invention relates to a method for transceiving a signal in a wireless communication system. A method for transceiving a signal in a wireless communication system according to one embodiment of the present invention comprises the steps of: deducing a channel from a transmission antenna of a transceiver; generating a reference signal by combining the deduced channel and a transmission signal from the transmission antenna; converting the reference signal into an analog signal; receiving a data signal and a self-interference signal by means of a reception antenna of the transceiver; and canceling the self-interference signal from the received data signal by means of the converted reference signal, wherein deducing a channel and combining signals are performed in the digital domain and discarding the self-interference signal is performed in the analog domain.

Claims

1. A method of transceiving a signal in a wireless communication system, comprising:

estimating a channel through a transmission antenna of a transceiver;

generating a reference signal by combining the estimated channel and a transmission signal of the transmission antenna;

converting the reference signal into an analog signal;

receiving a data signal and a self-interference signal using a reception antenna of the transceiver; and

cancelling the self-interference signal from the received data signal using the converted reference signal,

wherein the channel estimation and the signal combining are performed before passing through a digital-analog converter (DAC) and wherein the cancellation of the self-interference signal is performed before passing through an analog-digital converter (ADC).

2. The method of claim 1, wherein signal transmission and signal reception of the transceiver are performed simultaneously.

3. The method of claim 1, wherein signal transmission and signal reception of the transceiver are performed using an identical frequency band.

4. The method of claim 1, wherein the transceiver corresponds to a transceiver of either a base station or a user equipment.

5. The method of claim 4, wherein downlink signal transmission transmitted from the base station to the user equipment and uplink signal transmission transmitted from the user equipment to the base station are performed in a dedicated time interval assigned for the downlink signal transmission and a dedicated time interval assigned for the uplink signal transmission, respectively.

6. The method of claim 5, wherein information contained in the uplink signal transmission comprises at least one selected from the group consisting of a physical random access channel (PRACH), an sounding reference signal (SRS), a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH).

7. The method of claim 5, wherein information contained in the downlink signal transmission comprises at least one selected from the group consisting of a physical broadcast channel (PBCH), a primary synchronization signal/secondary synchronization signal (PSS/SSS), a reference signal and a data channel.

8. The method of claim 5, wherein the uplink signal transmission transmitted from the user equipment to the base station corresponds to an single carrier-frequency division multiple access (SC-FDMA) scheme and wherein the downlink signal transmission transmitted from the base station to the user equipment corresponds to an orthogonal frequency division multiple access (OFDMA) scheme.

9. The method of claim 5, wherein the user equipment does not perform uplink signal transmission in the dedicated time interval assigned for the downlink signal transmission of the base station.

10. The method of claim 5, wherein the base station does not perform downlink signal transmission in the dedicated time interval assigned for the uplink signal transmission of the user equipment.

11. The method of claim 1, wherein the transceiver comprises a plurality of transmission antennas.

12. The method of claim 1, wherein the self-interference signal corresponds to a signal transmitted by the transceiver and the signal received again via a reception antenna of the transceiver.

13. The method of claim 1, wherein the transmission signal of the transmission antenna corresponds to a signal amplified by a power amplifier (PA).

14. A method of transceiving a signal in a wireless communication system, comprising:

estimating a channel through a transmission antenna of a transceiver;

generating a reference signal by combining the estimated channel and a transmission signal of the transmission antenna;

receiving a signal using a reception antenna of the transceiver; and

cancelling a self-interference signal from the received signal using the reference signal,

wherein the channel estimation and the signal combining are performed in a digital domain and wherein the cancellation of the self-interference signal is performed in an analog domain.

15. A device transceiving a signal in a wireless communication system, comprising:

a transceiver; and

a processor,

wherein the processor configured to estimate a channel through a transmission antenna of the transceiver, to generate a reference signal by combining the estimated channel and a transmission signal of the transmission antenna, to convert the reference signal into an analog signal, to receive a data signal and a self-interference signal using a reception antenna of the transceiver, and to cancel the self-interference signal from the received data signal using the converted reference signal, and

wherein the channel estimation and the signal combining are performed in a digital domain and wherein the cancellation of the self-interference signal is performed in an analog domain.