Title of Invention

PRECODING FOR A MULTIPATH CHANNEL IN A MIMO SYSTEM

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.
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Documents:

2109-CHENP-2004 CORRESPONDENCE OTHERS 13-05-2011.pdf

2109-CHENP-2004 AMENDED PAGES OF SPECIFICATION 10-05-2011.pdf

2109-CHENP-2004 AMENDED CLAIMS 10-05-2011.pdf

2109-CHENP-2004 CORRESPONDENCE OTHERS.pdf

2109-CHENP-2004 CORRESPONDENCE PO.pdf

2109-CHENP-2004 FORM-1.pdf

2109-CHENP-2004 FORM-3 10-05-2011.pdf

2109-CHENP-2004 FORM-3.pdf

2109-CHENP-2004 FORM-5.pdf

2109-CHENP-2004 OTHER PATENT DOCUMENT 10-05-2011.pdf

2109-chenp-2004 other patent document. 10-05-2011.pdf

2109-CHENP-2004 POWER OF ATTORNEY 10-05-2011.pdf

2109-CHENP-2004 EXAMINATION REPORT REPLY RECIEVED 10-05-2011.pdf

2109-CHENP-2004 FORM-18.pdf

2109-CHENP-2004 CORRESPONDENCE OTHERS 29-07-2010.pdf

2109-CHENP-2004 DESCRIPTION(COMPLETE) GRANTED 20-05-2011.pdf


Patent Number 247796
Indian Patent Application Number 2109/CHENP/2004
PG Journal Number 21/2011
Publication Date 27-May-2011
Grant Date 19-May-2011
Date of Filing 22-Sep-2004
Name of Patentee QUALCOMM INCORPORATED
Applicant Address 5775 MOREHOUSE DRIVE, SAN DIEGO, CA 92121-1714
Inventors:
# Inventor's Name Inventor's Address
1 KETCHUM, John, W 37, CANDLEBERRY LANE, HARVARD, MASSACHUSETTS 01451
2 BJERKE, Bjorn 28 EXETER STREET, 408, BOSTON, MASSACHUSETTS 02116
PCT International Classification Number H04L25/03
PCT International Application Number PCT/US03/08807
PCT International Filing date 2003-03-19
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10/108,616 2002-03-27 U.S.A.