ANTENNA ISOLATION FOR FULL DUPLEX WITH DUAL ANTENNA PANELS

Abstract

Abstract: Disclosed is a method comprising increasing an antenna isolation between a first antenna panel and a second antenna panel by adjusting a radiation pattern associated with the first antenna panel and/or with the second antenna panel (1501). A first signal is then received via the first antenna panel and a second signal is transmitted via the second antenna panel substantially simultaneously (1502).

Description

Claims

1. An apparatus comprising at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, to cause the apparatus to: increase an antenna isolation between a first antenna panel and a second antenna panel by adjusting a radiation pattern associated with the first antenna panel and/or with the second antenna panel; andreceive a first signal via the first antenna panel and transmit a second signal via the second antenna panel substantially simultaneously.

2. An apparatus according to claim 1, further comprising maintaining the antenna isolation at least at a pre-defined level by adjusting the radiation pattern.

3. An apparatus according to claim 1, wherein the first antenna panel and the second antenna panel are separated by a distance of at least two wavelengths, wherein the at least two wavelengths are inversely proportional to a carrier frequency used by the apparatus.

4. An apparatus according to claim 1, wherein the radiation pattern is adjusted, while maintaining a direction of at least one beam.

5. An apparatus according to claim 1, further comprising adjusting an angular direction of the at least one beam, while maintaining the antenna isolation at a pre-defined level.

6. An apparatus according to claim 1, wherein the first antenna panel and the second antenna panel comprise a plurality of antenna elements, and the radiation pattern is adjusted by adjusting a power level on one or more antenna elements comprised in the plurality of antenna elements, and/or by adjusting an amplitude and/or phase associated with the one or more antenna elements.

7. An apparatus according to claim 1, wherein the radiation pattern is adjusted based on a pre-defined antenna beamforming codebook comprising a plurality of entries indicating antenna radiation pattern configurations for a time-division duplexing mode and for a full-duplex mode.

8. An apparatus according to claim 1, further comprising switching the apparatus from the time-division duplexing mode to the full-duplex mode.

9. An apparatus according to claim 8, wherein the first antenna panel and the second antenna panel are enabled, while the apparatus is in the full-duplex mode;wherein the first antenna panel is enabled and the second antenna panel is disabled, while the apparatus is in the time-division duplexing mode; andwherein the first antenna panel is capable of transmitting and receiving, while the apparatus is in the time-division duplexing mode, wherein the transmitting and receiving is performed at substantially different time instants.

10. An apparatus according to claim 1, further comprising: establishing, via the first antenna panel, a connection to a base station, while in the time-division duplexing mode;measuring, via the second antenna panel, a quality indicator associated with the connection to the base station, while in the time-division duplexing mode;determining the antenna isolation between the first antenna panel and the second antenna panel, while in the time-division duplexing mode;transmitting an indication to the base station, if the quality indicator and the antenna isolation exceed a pre-defined threshold value, while in the time-division duplexing mode; andreceiving from the base station instructions to switch from the time-division duplexing mode to the full-duplex mode.

11. An apparatus according to claim 1, further comprising performing self-interference cancellation with analog filtering and digital cancellation.

12. An apparatus according to claim 1, wherein the apparatus is comprised in a terminal device.

13-15. (canceled)

16. A method comprising: increasing an antenna isolation between a first antenna panel and a second antenna panel by adjusting a radiation pattern associated with the first antenna panel and/or with the second antenna panel; andreceiving a first signal via the first antenna panel and transmitting a second signal via the second antenna panel substantially simultaneously.

17. A non-transitory computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus to perform at least the following: increase an antenna isolation between a first antenna panel and a second antenna panel by adjusting a radiation pattern associated with the first antenna panel and/or with the second antenna panel; andreceive a first signal via the first antenna panel and transmit a second signal via the second antenna panel substantially simultaneously.

18. The method according to claim 16, further comprising maintaining the antenna isolation at least at a pre-defined level by adjusting the radiation pattern.

19. The method according to claim 16, wherein the first antenna panel and the second antenna panel are separated by a distance of at least two wavelengths, wherein the at least two wavelengths are inversely proportional to a carrier frequency.

20. The method according to claim 16, wherein the radiation pattern is adjusted, while maintaining a direction of at least one beam.

21. The method according to claim 16, further comprising adjusting an angular direction of the at least one beam, while maintaining the antenna isolation at a pre-defined level.

22. The method according to claim 16, wherein the first antenna panel and the second antenna panel comprise a plurality of antenna elements, and the radiation pattern is adjusted by adjusting a power level on one or more antenna elements comprised in the plurality of antenna elements, and/or by adjusting an amplitude and/or phase associated with the one or more antenna elements.

23. The method according to claim 16, wherein the radiation pattern is adjusted based on a pre-defined antenna beamforming codebook comprising a plurality of entries indicating antenna radiation pattern configurations for a time-division duplexing mode and for a full-duplex mode.