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. 03, 1984
Filed:
Jul. 31, 1981
Applicant:
Inventors:
Christian Chavey, Boulogne Billancourt, FR;
Pierre Lagoutte, Boulogne Billancourt, FR;
Assignee:
LMT Radio Professionnelle, Boulogne Billan Court, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ; H04B / ;
U.S. Cl.
CPC ...
179 / ; 455 12 ;
Abstract
In a radiotelephone system comprising a ground central station and a plurality of peripheral stations having access to a geostationary satellite, demand-assignment multiple-access (DAMA) conversations are established by single-span transmission between subscribers of the peripheral stations. In order to prevent conflicts arising from two simultaneous call demands, a rectangular-wave synchronization signal is transmitted by the central station to the peripheral stations in a specialized channel and the demands are caused to coincide with the active wavefronts of the synchronization signal.