BEAMFORMING METHOD AND DEVICE

• US 20100103900A1
• Filed: 09/19/2007
• Published: 04/29/2010
• Est. Priority Date: 12/08/2006
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute, Samsung Electronics Co. Ltd.
• Original Assignee: Electronics and Telecommunications Research Institute, Samsung Electronics Co. Ltd.
• Inventors: Ahn, Jee-Hwan, Kwon, Dong-Seung, Yeh, Choong-Il
• Application Number:
  US12/518,233
• Publication Number:
  US 20100103900A1
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04B 7/086 using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
• CPC Class Codes: H04W 74/00 Wireless channel access
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The present invention relates to a beamforming device in an orthogonal frequency division multiplexing access system, and a method thereof. In the method, a switched beamforming algorithm is applied to perform downlink beamforming, and an adaptive beamforming algorithm is applied to perform uplink receiving beamforming. In addition, a half wavelength array antenna is used to simultaneously allocate the same resource to two terminals separately positioned in two different spaces, so as to support spatial division multiple access (SDMA). In this case, since a base station uses channel status information at transmitter (CSIT) for transmitting beamforming and receiving beamforming, the SDMA may be supported without obtaining additional channel status information at receiver (CSIR) when realizing the uplink receiving beamforming.

Claims

1. A beamforming device for detecting a packet transmitted by terminal before entering a network to enter the network, the beamforming device comprising:

at least one receiving antenna for receiving a signal from the terminal;

a data acquisition unit for obtaining and outputting the signal received through the at least one receiving antenna;

a weighting vector applying unit for applying at least one weighing vector to the received signal and outputting the signal; and

a detection unit for detecting the signal output from the weighting vector applying unit for each the weighting vector.

2. The beamforming device of claim 1, wherein the received signal is received by using sharing resources that are allowed to be collided.

3. The beamforming device of claim 1, wherein the at least one weighting vector is corresponding to a switched beamforming (BF) algorithm.

4. The beamforming device of claim 3, wherein the at least one weighting vector is a weighting vector applied when a downlink transmission beamforming operation is performed.

5. A beamforming method of a base station to detect packets transmitted by a plurality of terminals to enter a network, the beamforming method comprising:

receiving a signal including packets transmitted from the terminals; and

detecting the respective packets one-by-one by sequentially applying weighting vectors belonging to the base station.

6. The beamforming method of claim 5, further comprising allocating sharing resources in which the transmitted packets from the terminals are allowed to be collided.

7. The beamforming method of claim 6, further comprising solving collision caused by the plurality of the transmitted packets from the plurality of terminals.

8. The beamforming method of claim 6, further comprising reducing interference caused by the plurality of the transmitted packets from the plurality of terminals.

9. An uplink receiving beamforming method of a base station in a frequency division duplex (FDD) wireless communication system, the uplink receiving beamforming method comprising:

receiving transmission channel information measured by a terminal;

grouping the terminal according to a preferred switched beam index included in the transmission channel information;

realizing spatial division multiple access corresponding to the terminal grouped; and

obtaining a signal received from the terminal according to the spatial division multiple access through an adaptive beamforming algorithm.

10. The uplink receiving beamforming method of claim 9, further comprising, allocating uplink resources by using the preferred band index included in the transmission channel information,

wherein the obtaining of the signal comprises receiving the signal from the terminal by using the allocated uplink resources.

11. The uplink receiving beamforming method of claim 10, wherein the obtaining of the signal comprises receiving the signal from the terminal by using a half wavelength array antenna.

12. The uplink receiving beamforming method of claim 9, wherein the transmission channel information is transmission channel information received to realize downlink transmission beamforming of the base station.

13. The uplink receiving beamforming method of claim 12, wherein the preferred switched beam index is information corresponding to downlink transmission beamforming realization to which a switched beamforming algorithm is applied.