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:
Feb. 21, 1989
Filed:
Aug. 06, 1986
Applicant:
Inventor:
Susumu Otani, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ; H04J / ;
U.S. Cl.
CPC ...
375 81 ; 375 93 ; 375 97 ; 375106 ; 370104 ;
Abstract
A carrier wave recovery system for a slotted ALOHA system is disclosed. In a time slot where a burst is not inputted, the frequency of oscillator means is locked to a mean value of carrier wave frequencies of bursts which were received in the past, thereby allowing a minimum of initial frequency offset to occur. A voltage controlled oscillator frequency is controlled at initial pull-in to an average frequency of the highest and lowest carrier wave frequencies of an input burst signal.