US5084900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spread spectrum system with random code retransmission
Assignee: Gilat Satellite Networks Ltd
•
Filing: 1989-12-21
•
Granted: 1992-01-28
•
Expires: 2009-12-21
Abstract
Abstract A communication system includes a hub station and a plurality of terminal stations. An inbound satellite communication link from each of the terminal stations to the hub station sends digital data packets encoded with a CDMA code for code division multiple access during synchronized time slots on a contention channel. Each of the digital data packets is encoded with the same CDMA code during a first transmission, but each packet is encoded with an alternate CDMA code during any subsequent transmission.
Inventors
- 👤 Desmond P. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/204; H04B7/216; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A communication system comprises of: A hub station; and a plurality of terminal stations, said terminal stations adapted to provide an inbound communication link from each of said terminal stations to said hub station for sending digital data packets encoded with a CDMA code for code division multiple access during synchronized time slots on a contention channel, each of said digital data packets encoded with the same CDMA code during a first transmission, said terminal stations provided with CDMA code means for pseudorandomly selecting from a pool of alternative CDMA codes for encoding each packet with an alternate CDMA code during any subsequent transmission.
Claim 2
Dependent Claim
104 words
A communication system comprises of: A hub station; and a plurality of terminal stations, said terminal stations adapted to provide an inbound communication link from each of said terminal stations to said hub station for sending digital data packets encoded with a CDMA code for code division multiple access during synchronized time slots on a contention channel, each of said digital data packets encoded with the same CDMA code during a first transmission, said terminal stations provided with CDMA code means for pseudorandomly selecting from a pool of alternative CDMA codes for encoding each packet with an alternate CDMA code during any subsequent transmission.
References Cited (Backward Citations)
US3879581A
Cited
JPS59112731A
Cited
US4617674A
Cited
US4639937A
Cited
US4688216A
Cited
US4637017A
Cited
US4742512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |