John Husted

US Patent:

39461610, Mar 23, 1976

Filed:

Oct 26, 1970

Appl. No.:

5/084105

Inventors:

John M. Husted - Vienna VA
Ova Gene Gabbard - Germantown MD
William G. Schmidt - Rockville MD

Assignee:

Communications Satellite Corporation - Washington DC

International Classification:

H04j 306

US Classification:

179 15AF

Abstract:

A stuff decision code word of multiple bit length is transmitted over a number of frames equal to the number of bits per stuff decision code word. Advantage is made of a unique word used for burst synchronization wherein a common code word is used for both stuff decision and burst synchronization. A hierarchy of bursts is established to identify the particular channel of information to which the stuff decision is associated.

US Patent:

40547531, Oct 18, 1977

Filed:

Oct 20, 1975

Appl. No.:

5/624093

Inventors:

Pradman Kaul - Gaithersburg MD
Ova Gene Gabbard - Germantown MD
John M. Husted - Vienna VA

Assignee:

Digital Communications Corporation - Gaithersburg MD

International Classification:

H04J 306

US Classification:

179 15BS

Abstract:

A TDMA system in which each station times its respective data burst from a reference sync burst transmitted by a designated primary reference station over the satellite link. Another station transmits a secondary sync burst timed from the primary stations sync burst. To maintain synchronism at the satellite each station has a burst synchronizer operated by receipt of the primary reference sync burst. The secondary sync burst is also received by each of the stations and is capable of ensuring synchronization in case of failure of the primary stations's sync burst.