CN101002447A

5G,4G,3G

Title

Method and apparatus for implementing space frequency block coding in an orthogonal frequency division multiplexing wireless communication system

Application Number:

CN2005827388

Publication Date:

18-07-2007

Current Assignee:

INTERDIGITAL INC

Family ID:

35908129

Application Date:

11-08-2005

Declaring Company:

INTERDIGITAL INC

Publication Country:

US

Priority Date:

12-08-2004

View on Espacenet goto-link

Title

Method and apparatus for implementing space frequency block coding in an orthogonal frequency division multiplexing wireless communication system

Application Number:

CN2005827388

Family ID:

35908129

Publication Country:

US

Publication Date:

18-07-2007

Application Date:

11-08-2005

Priority Date:

12-08-2004

Current Assignee:

INTERDIGITAL INC

Declaring Company:

INTERDIGITAL INC

View on Espacenet goto-link

Abstract  Abstract

This invention claims the method and device to execute SFBC in OFDM wireless communication system and can be applied to close loop mode and open loop mode wherein in close loop mode power load and inherent beam shaping are executed based on channel state information; frequency coding data stream is multiplexed into two or more data streams; power load is executed based on channel state information on various multiplex data streams; SFBC is executed based on the data stream of various pairing sub-carriers; then inherent beam shaping is executed based on the channel state information in order to compute the inherent beam on multi-transferring antenna; power load is executed based on two or more SFBC blocks or various inherent beam; besides execute power load by span sub-carrier or sub-carrier group aiming at weak inherent mode.

The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.

Note:

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