Title:
PRECODING FOR A MULTIPATH CHANNEL IN A MIMO SYSTEM
Document Type and Number:
WIPO Patent Application WO2003084092
Kind Code:
A3
Abstract:
Techniques for precoding data for a multipath channel in a MIMO system. In one method, data is coded in accordance with one or more coding schemes to provide coded data, which is further modulated (i.e., symbol mapped) in accordance with one or more modulation schemes to provide modulation symbols. An estimated response of the MIMO channel is obtained (e.g., provided by a receiver), and an equivalent channel response is derived based on the estimated MIMO channel response and a response of a feed-forward filter of a decision feedback equalizer. The modulation symbols are then precoded based on the equivalent channel response to provide precoded symbols, which are further preconditioned based on the estimated MIMO channel response (e.g., using spatio-temporal pulse-shaping) to provide preconditioned symbols for transmission over the MIMO channel. The feed-forward filter may be adapted based on a minimum mean square error (MMSE) criterion.
Inventors:
KETCHUM JOHN W
BJERKE BJORN A
BJERKE BJORN A
Application Number:
PCT/US2003/008807
Publication Date:
December 04, 2003
Filing Date:
March 19, 2003
Export Citation:
Assignee:
QUALCOMM INC (US)
International Classes:
H04B7/005; H04B7/04; H04J99/00; H04B7/06; H04L25/03; (IPC1-7): H04L25/03; H04B7/06
Domestic Patent References:
| WO2001061952A1 | 2001-08-23 | |||
| WO1998009381A1 | 1998-03-05 | |||
| WO2002005506A2 | 2002-01-17 |
Foreign References:
| EP1117197A2 | 2001-07-18 | |||
| US6327664B1 | 2001-12-04 |
Other References:
HEMANTH SAMPATH: "Linear Precoding and Decoding for Multiple Input Multiple Output (MIMO) Wireless Channels", April 2001, PHD THESIS, STANFORD UNIVERSITY, XP002245817
FISCHER R F H ET AL: "Tomlinson-harashima precoding in space-time transmission for low-rate backward channel", INTERNATIONAL ZURICH SEMINAR ON BROADBAND COMMUNICATIONS, 19 February 2002 (2002-02-19) - 21 February 2002 (2002-02-21), Zurich, pages 7-1 - 7-6, XP010584387
TUGNAIT J K: "FIR inverses to MIMO rational transfer functions with application to blind equalization", SIGNALS, SYSTEMS AND COMPUTERS, 1996. CONFERENCE RECORD OF THE THIRTIETH ASILOMAR CONFERENCE ON PACIFIC GROVE, CA, USA 3-6 NOV. 1996, LOS ALAMITOS, CA, USA,IEEE COMPUT. SOC, US, 3 November 1996 (1996-11-03), pages 295 - 299, XP010231440, ISBN: 0-8186-7646-9
SAMPATH H ET AL: "Achievable rate region for spatial multiplexing systems using the MMSE criterion", ISIT 2000, 25 June 2000 (2000-06-25), Sorrento, pages 496 - 496, XP010510369
SAMPATH H ET AL: "Pre-equalization for MIMO wireless channels with delay spread", VTC 2000, vol. 3, 24 September 2000 (2000-09-24), pages 1175 - 1178, XP010524685
FISCHER R F H ET AL: "Tomlinson-harashima precoding in space-time transmission for low-rate backward channel", INTERNATIONAL ZURICH SEMINAR ON BROADBAND COMMUNICATIONS, 19 February 2002 (2002-02-19) - 21 February 2002 (2002-02-21), Zurich, pages 7-1 - 7-6, XP010584387
TUGNAIT J K: "FIR inverses to MIMO rational transfer functions with application to blind equalization", SIGNALS, SYSTEMS AND COMPUTERS, 1996. CONFERENCE RECORD OF THE THIRTIETH ASILOMAR CONFERENCE ON PACIFIC GROVE, CA, USA 3-6 NOV. 1996, LOS ALAMITOS, CA, USA,IEEE COMPUT. SOC, US, 3 November 1996 (1996-11-03), pages 295 - 299, XP010231440, ISBN: 0-8186-7646-9
SAMPATH H ET AL: "Achievable rate region for spatial multiplexing systems using the MMSE criterion", ISIT 2000, 25 June 2000 (2000-06-25), Sorrento, pages 496 - 496, XP010510369
SAMPATH H ET AL: "Pre-equalization for MIMO wireless channels with delay spread", VTC 2000, vol. 3, 24 September 2000 (2000-09-24), pages 1175 - 1178, XP010524685
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