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:
Mar. 21, 2006
Filed:
Mar. 09, 2001
Ravi Narasimhan, Los Altos, CA (US);
Piu Bill Wong, Monte Sereno, CA (US);
Shimon B. Scherzer, Sunnyvale, CA (US);
Jiangfeng Wu, Combell, CA (US);
Ravi Narasimhan, Los Altos, CA (US);
Piu Bill Wong, Monte Sereno, CA (US);
Shimon B. Scherzer, Sunnyvale, CA (US);
Jiangfeng Wu, Combell, CA (US);
Kathrein-Werke KG, Rosenheim, DE;
Abstract
The present invention utilizes adaptive antenna arrays at a base station to increase the forward link capacity of mobile data systems. One or more simultaneous forward link beams are formed and are switched (or hopped) in a time division manner among subscribers. The beam hopping sequence is randomized by varying the time slot and/or carrier frequency of each subscriber. In space-time hopping, the position within a frame of the time slot for each subscriber is varied in a pseudo random sequence. In space-frequency hopping, the carrier frequency for each frame is varied in a pseudo random sequence. The pseudo random beam hopping sequence provides a gain due to interference diversity in addition to the antenna array gain. Forward link beam forming algorithms use space-time or space-frequency hopping to increase the capacity of mobile data systems.