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:
Oct. 18, 2005
Filed:
Aug. 14, 2001
Stuart T. Linsky, Rancho Palos Verdes, CA (US);
Scott A. Cooper, Seattle, WA (US);
Christopher W. Walker, Stevenson Ranch, CA (US);
Ali Robert Golshan, Hawthorne, CA (US);
Stuart T. Linsky, Rancho Palos Verdes, CA (US);
Scott A. Cooper, Seattle, WA (US);
Christopher W. Walker, Stevenson Ranch, CA (US);
Ali Robert Golshan, Hawthorne, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A decision directed phase locked loop (DD-PLL) is efficiently implemented in a communication receiver. The phase locked loop includes an enhanced block decoder inside a phase detector which takes in the baseband complex samples and the current channel phase estimate (or the tracked phase) and generates a feedback phase error term. A loop filter filters the phase error terms and a phase accumulator updates the tracked phase estimate on each iteration of the loop.