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:
Aug. 22, 2000
Filed:
Feb. 02, 1998
Donald L Schilling, Sands Point, NY (US);
Joseph Garodnick, Centerville, MA (US);
Golden Bridge Technology, Inc., West Long Branch, NJ (US);
Abstract
A system for maintaining orthogonality among a plurality of spread-spectrum signals arriving at a base station from a plurality of remote units. Each spread-spectrum signal of the plurality of spread-spectrum signals from each remote unit of the plurality of remote units is transmitted as a packet having a header followed by data. A base station sends a plurality of adjustment signals over a communications channel to the plurality of remote units, respectively. At each remote unit, a circuit selects, from the plurality of adjustment signals, a received-adjustment signal designated for each remote unit. A chip-sequence generator, located at each remote unit, generates a chip-sequence signal assigned to a respective remote unit and, responsive to the adjustment signal, adjusts timing of a chip-sequence signal generated by the chip-sequence generator. A remote spread-spectrum spreader processes, using the chip-sequence signal generated by the chip-sequence generator, a header-symbol signal and a data-sequence signal as an RU-spread-spectrum signal. An RU-transmitter section, time synchronized responsive to the adjustment signal, sends the RU-spread-spectrum signal over the communications channel to the base station. A base-station despreader despreads the RU-spread-spectrum signal as a header and data. A comparator compares the header with a timing signal to generate the adjustment signal.