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:
Jan. 24, 1989
Filed:
Aug. 20, 1987
Applicant:
Inventor:
Yuuhei Ishi, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
370104 ;
Abstract
A synchronization system maintains the accuracy of time frame synchronization in an earth satellite time division multiple access system. Two metric patterns are provided for giving synchronization accuracy. The system selects one pattern, compares accuracy with threshold values. If the comparison shows less than threshold accuracy, the system switches to the other pattern.