Title:
FACILITATING CHANNEL SOUNDING FOR MULTIPLE INPUT AND MULTIPLE OUTPUT TRANSMISSIONS
Document Type and Number:
WIPO Patent Application WO/2013/016463
Kind Code:
A3
Abstract:
Methods and apparatuses are provided for facilitating channel sounding for multiple-input and multiple-output (MIMO) transmissions between an access terminal and an access point. According to one feature, the access point may transmit a data frame to an access terminal using a plurality of spatial streams and a plurality of antennas. The access terminal may transmit an acknowledgement frame back to the access point, where the acknowledgement frame is transmitted as both a sounding signal and as to acknowledge receipt of the data frame. According to another feature, the access point may transmit a data frame and a matrix request frame to an access terminal. The access terminal may determine channel matrix information, and may send the channel matrix information together with an acknowledgement frame back to the access point.
Inventors:
WENTINK MAARTEN MENZO (NL)
VAN NEE DIDIER JOHANNES RICHARD (NL)
VAN NEE DIDIER JOHANNES RICHARD (NL)
Application Number:
PCT/US2012/048204
Publication Date:
June 13, 2013
Filing Date:
July 25, 2012
Export Citation:
Assignee:
QUALCOMM INC (US)
WENTINK MAARTEN MENZO (NL)
VAN NEE DIDIER JOHANNES RICHARD (NL)
WENTINK MAARTEN MENZO (NL)
VAN NEE DIDIER JOHANNES RICHARD (NL)
International Classes:
H04L1/16; H04L1/00; H04L25/02
Domestic Patent References:
| WO2008084377A2 | 2008-07-17 | |||
| WO2006107886A2 | 2006-10-12 |
Foreign References:
| EP1662712A1 | 2006-05-31 | |||
| US20070189408A1 | 2007-08-16 | |||
| US20100105402A1 | 2010-04-29 | |||
| US20050030897A1 | 2005-02-10 |
Other References:
KUZMINSKIY A M ET AL: "Downlink SDMA for legacy IEEE 802.11 A/G mobile stations: acknowledgement recovery and channel estimation", SIGNAL PROCESSING ADVANCES IN WIRELESS COMMUNICATIONS, 2005 IEEE 6TH W ORKSHOP ON NEW YORK, NY, USA JUNE 2-8, 2005, PISCATAWAY, NJ, USA,IEEE, 2 June 2005 (2005-06-02), pages 216 - 220, XP010834342, ISBN: 978-0-7803-8867-3, DOI: 10.1109/SPAWC.2005.1505903
Attorney, Agent or Firm:
CHEATHAM, Kevin, T. (5775 Morehouse DriveSan Diego, CA, US)
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