Method and apparatus for spatial modulation

Patent metadata

Field	Value
Publication number	US-2016261318-A1
Application number	US-201514635281-A
Country	US
Kind code	A1
Filing date	Mar 2, 2015
Priority date	Mar 2, 2015
Publication date	Sep 8, 2016
Grant date	—

Abstract

A method of transmitting signals by a transmitting side device having multiple antennas (hereinafter ‘N antennas’) is disclosed. In this method, the transmitting side device configures M antenna ports from among N antennas, where M<N, where the M antenna port comprises an antenna port configured as a combination of two or more antennas selected from among the N antennas. The transmitting side device selects L antenna pairs for data transmission from among the M antenna ports based on Alamouti coding, where L<M. And, the transmitting side device transmits data to the receiving side device via the selected L antenna pairs.

First claim

1 . A method of transmitting signals by a transmitting side device having N antennas, wherein N>1, the method comprising:
configuring M antenna ports from among the N antennas, wherein M<N, wherein each of the M antenna ports comprise an antenna port configured as a combination of two or more antennas selected from among the N antennas; selecting L antenna pairs for data transmission from among the M antenna ports based on Alamouti coding, wherein L<M; and transmitting data to the receiving side device via the selected L antenna pairs, wherein information is represented based on the selection of L antenna pairs.

2 . The method of claim 1 , wherein the configuring the M antenna ports comprises:
transmitting reference signals (RSs) to the receiving side device via the N antennas; receiving feedback information from the receiving side device, wherein the feedback information informs the transmitting side device of estimated channel information for each of the N antennas; and configuring the M antenna ports based on the estimated channel information.

3 . The method of claim 2 , wherein the antenna port configured as the combination of two or more antennas is configured by:
allocating weights to each of two or more antennas based on the estimated channel information.

4 . (canceled)

5 . The method of claim 1 , wherein an amount of information to be represented based on the selection of L antenna pairs is larger than an amount of information to be represented based on a selection of a single antenna from M antenna ports.

6 . The method of claim 1 , wherein the L antenna pairs are selected with equal selection frequency for each of the M antenna ports over time.

7 . The method of claim 1 , wherein different antenna pairs are selected for different time-frequency resources for data transmission.

8 . A method of receiving signals, by a receiving device, transmitted through N transmission antennas, wherein N>1, the method comprising:
receiving reference signals (RSs) transmitted via the N transmission antennas; transmitting feedback information to a transmitting side device, wherein the feedback information informs the transmitting side device of estimated channel information for each of the N transmission antennas; and receiving data transmitted via L transmission antenna pairs of the transmitting side device based on Alamouti coding, wherein the L transmission antenna pairs are selected among M transmission antenna ports, wherein the M transmission antenna ports are configured from among the N transmission antennas based on the estimated channel information, and wherein L<M<N, wherein information is represented based on the selection of L antenna pairs.

9 . The method of claim 8 , wherein each of the M transmission antenna ports comprise an antenna port configured as a combination of two or more transmission antennas selected from among the N transmission antennas.

10 . The method of claim 9 , wherein the antenna port configured as the combination of two or more antennas is configured by:
allocating weights to each of two or more antennas based on the estimated channel information.

11 . (canceled)

12 . The method of claim 8 , wherein an amount of information to be represented based on the selection of L antenna pairs is larger than an amount of information to be represented based on a selection of a single antenna from M antenna ports.

13 . The method of claim 8 , wherein the L antenna pairs are selected with equal selection frequency for each of the M antenna ports over time.

14 . The method of claim 8 , wherein different antenna pairs are selected for different time-frequency resources for data transmission.

Assignees

• Lg Electronics Inc

Inventors

• Ko Hyunsoo
• Cho Heejeong
• Choi Hyeyoung
• Byun Iimu
• Park Kungmin

Classifications

• H04B7/0417 Primary

  Feedback systems · CPC title

• H04B7/0697

  using spatial multiplexing · CPC title

• H04B7/061

  using feedback from receiving side · CPC title

• H04L5/0005

  Time-frequency · CPC title

• H04B7/0691

  using subgroups of transmit antennas · CPC title