The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 2004
Filed:
Sep. 19, 2000
Thomas L. Tapp, Cedar Rapids, IA (US);
Joseph T. Graf, Robins, IA (US);
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Abstract
A method and apparatus for receiving data over a dispersive media is disclosed. The received signal is composed of an unknown data segment preceded and followed by known data segments. The communication apparatus generates a replica of the known data segments. Channel characteristics existing at the time of transmission of the known data segments are estimated by comparing the known data segments with the replica. The symbols of the unknown data segment are then determined via application of a QR factorization. Factorization can be accomplished via Householder transformation, Givens rotation or fast Givens rotation. Decisions can be made on the various unknown symbols as they are analyzed and then fed back via back substitution.