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:
Mar. 11, 2003
Filed:
Aug. 12, 1999
William E. Ryan, Oro Valley, AZ (US);
Ali Ghrayeb, Tucson, AZ (US);
New Mexico State University Technology Transfer Corporation, Las Cruces, NM (US);
Abstract
A method of canceling intersymbol interference (ISI) for a signal bit a at time k, where k&egr;{0, ±1, ±2, . . . } in data transmission and data storage channels, by modelling the channel; training a RAM with known values for a to acquire the model of the channel; searching for the optimal address for the RAM, with past, present, and future values of a , to be used in minimizing the ISI in the received signal; and canceling ISI from the received signal. A RAM-search method and apparatus is presented which operates in cooperation with Viterbi detection and decoding, as well as with BCJR-APP detection and decoding.