BEAMFORMING METHOD AND APPARATUS THEREFOR

• US 20180013477A1
• Filed: 01/15/2016
• Published: 01/11/2018
• Est. Priority Date: 01/16/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Jaewon, Ahn, Seokki, Lee, Namjeong, Yu, Hyunkyu
• Granted Patent: US 10,454,552 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/06 at the transmitting station
• CPC Class Codes: H04B 7/0617 for beam forming

Abstract

The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate than a 4G communication system such as LTE. An embodiment of the present specification relates to an apparatus and a method for MIMO transmission and reception in a closed-loop beamforming system. A communication method of a base station, according to one embodiment of the present invention, may comprise the steps of: transmitting information for channel measurement to a terminal; receiving channel-related information from the terminal; transmitting a first symbol via at least two antennas; and transmitting a second symbol via the at least two antennas by applying different channel mapping rules to the second symbol in the at least two antennas. One embodiment of the present invention can improve overall performance without downward leveling by a symbol transmitted via an antenna having low average channel power.

Claims

1. A communication method of a base station, the method comprising:

transmitting channel measurement configuration information to a terminal;

receiving channel information from the terminal;

transmitting a first symbol through at least two antennas; and

transmitting a second symbol to which different channel mapping rules are applied for the at least two antennas.

2. The method of claim 1, wherein receiving the channel information further comprises receiving information on the different channel mapping rules to be applied to the at least two antennas from the terminal.

3. The method of claim 1, further comprising:

determining the different channel mapping rules to be applied to the at least two antennas based on the channel information; and

transmitting information on the determined channel mapping rules to the terminal.

4. The method of claim 1, wherein the first and second symbols are transmitted through two antennas according to an equation:

5. The method of claim 1, wherein the first and second symbols are transmitted through two antennas according to an equation:

6. The method of claim 1, wherein the first and second symbols are transmitted through two antennas according to an equation:

7. A communication method of a terminal, the method comprising:

receiving channel measurement configuration information from a base station;

measuring channels;

transmitting channel information to the base station;

receiving a first symbol through at least two antennas; and

receiving a second symbol to which different channel mapping rules are applied for the at least two antennas.

8. The method of claim 7, wherein transmitting the channel information comprises:

determining channel mapping rules to be applied for the at least two antennas based on a channel measurement result; and

transmitting information on the channel mapping rules to the base station.

9. The method of claim 7, further comprising receiving information on the channel mapping rules to be applied to the at least two antennas from the base station.

10. A base station comprising:

a communication unit which transmits and receives signals; and

a controller which controls transmitting channel measurement configuration information to a terminal, receiving channel information from the terminal, transmitting a first symbol through at least two antennas, and transmitting a second symbol to which different channel mapping rules are applied for the at least two antennas.

11. The base station of claim 10, wherein the controller controls receiving information on the different mapping rules to be applied to the at least two antennas from the terminal.

12. The base station of claim 10, wherein the controller controls determining the different mapping rules to be applied to the at least two antennas based on the channel information and transmitting information on the determined channel mapping rules to the terminal.

13. The base station of claim 10, wherein the controller controls transmitting the first and second symbols through two antennas according to an equation:

14. The base station of claim 10, wherein the controller controls transmitting the first and second symbols through two antennas according to an equation:

15. The base station of claim 10, wherein the controller controls transmitting the first and second symbols through two antennas according to an equation:

16. A terminal comprising:

a communication unit which transmits and receives signals; and

a controller which controls receiving channel measurement configuration information from a base station, measuring channels, transmitting channel information to the base station, receiving a first symbol through at least two antennas, and receiving a second symbol to which different channel mapping rules are applied for the at least two antennas.

17. The terminal of claim 16, wherein the controller controls determining channel mapping rules to be applied for the at least two antennas based on a channel measurement result and transmitting information on the channel mapping rules to the base station.

18. The terminal of claim 16, wherein the controller controls receiving information on the channel mapping rules to be applied to the at least two antennas from the base station.

19-26. -26. (canceled)