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:
May. 22, 2018
Filed:
Mar. 09, 2017
Applicant:
Apple Inc., Cupertino, CA (US);
Inventor:
Yuval Avner, Haifa, IL;
Assignee:
Apple Inc., Cupertino, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L 27/22 (2006.01); H04W 4/00 (2018.01);
U.S. Cl.
CPC ...
H04L 27/22 (2013.01); H04W 4/008 (2013.01);
Abstract
This document describes techniques for decoding a convolutionally coded signal using a trellis decoder in a drift robust manner. A convolutionally coded and differentially modulated signal may be received. The signal may be decoded using a trellis. A noise prediction loop may be used to reduce noise characteristics of the signal. A frequency offset estimation loop may be used to reduce a frequency offset drift of the signal. The noise prediction loop and the frequency offset estimation loop may be applied at each branch of the trellis.