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:
Jul. 18, 2000
Filed:
Oct. 10, 1997
Oliver W Saunders, Los Angeles, CA (US);
Jean A Develet, Jr, Rancho Palos Verdes, CA (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
A communications system (100) is disclosed for processing at least one uplink channel contained in at least one uplink beam (112) transmitted to a satellite (106). The communications system (100) includes at least one user terminal (110) that extracts a system clock, a synchronization word, and timing correction information from a downlink beam transmitted by a satellite. The user terminal includes a timing controller (226) that aligns uplink channel transmissions by generating a system clock based on the downlink symbol clock, said synchronization word, and said timing correction information. The user terminal includes at least one spread-spectrum spreader (254) for encoding at least one uplink channel, and a transmitter connected to the spread-spectrum spreader (254) for transmitting said at least one uplink channel in an uplink beam (112). The system also includes a satellite (106) which generates the synchronization word, downlink symbol clock, and the timing correction information needed by the user terminal. The satellite also includes a wideband FFT processor (322) that extracts uplink channels from the uplink beam (112) in bulk, and a despreader (326) connected to the FFT processor (322) for simultaneously despreading user signals contained in said uplink channels.