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:
Dec. 02, 2003
Filed:
Jan. 27, 2000
Applicant:
Inventor:
Andrew John Aftelak, Basingstoke, GB;
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D 3/24 ; H03L 7/00 ;
U.S. Cl.
CPC ...
H03D 3/24 ; H03L 7/00 ;
Abstract
A frame timing lock detector circuits and a methods of frame timing lock detection for a digital communications system. A known data sequence is extracted from a received radio signal and multiplied, in a multiplier, together with a reference signal that includes the symbols of the known data sequence raised to the power of a multiple of three. The phase of the multiplier output is measured and an average of an absolute value of this measured phase is compared with a threshold to detect correct frame timing lock.