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:
Nov. 23, 2010
Filed:
Dec. 07, 2005
Klein S. Gilhousen, Bozeman, MT (US);
Irwin M. Jacobs, La Jolla, CA (US);
Roberto Padovani, San Diego, CA (US);
Lindsay A. Weaver, Jr., Boulder, CO (US);
Charles E. Wheatley, Iii, Del Mar, CA (US);
Andrew J. Viterbi, La Jolla, CA (US);
Klein S. Gilhousen, Bozeman, MT (US);
Irwin M. Jacobs, La Jolla, CA (US);
Roberto Padovani, San Diego, CA (US);
Lindsay A. Weaver, Jr., Boulder, CO (US);
Charles E. Wheatley, III, Del Mar, CA (US);
Andrew J. Viterbi, La Jolla, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the exemplary embodiment, transmit power of mobile unit signals is controlled based on signal power received by the mobile unit and power adjustment commands sent to the mobile unit.