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. 08, 1997
Filed:
Nov. 18, 1994
Applicant:
Inventors:
Chandra C Varanasi, Simi Valley, CA (US);
Nersi Nazari, Scotts Valley, CA (US);
Assignee:
Seagate Technology, Inc., Scotts Valley, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; H03M / ;
U.S. Cl.
CPC ...
371 43 ;
Abstract
A method is provided for encoding and decoding binary data, using a non-quasicatastrophic and phase invariant matched spectral null code for a partial response channel. The method is particularly suited for partial response systems wherein the order of the higher order null in the transfer function of the partial response channel is .gtoreq.1, resulting in signal-to-noise (SNR) gain at the channel output. In a preferred form, the method is used to develop a rate 3/10 Nyquist-null trellis code.