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:
Sep. 06, 2005
Filed:
Aug. 27, 2002
Murali Paravath Menon, Waltham, MA (US);
John W. Ketchum, Harvard, MA (US);
Mark Wallace, Bedford, MA (US);
Jay Rod Walton, Carlisle, MA (US);
Steven J. Howard, Harvard, MA (US);
Murali Paravath Menon, Waltham, MA (US);
John W. Ketchum, Harvard, MA (US);
Mark Wallace, Bedford, MA (US);
Jay Rod Walton, Carlisle, MA (US);
Steven J. Howard, Harvard, MA (US);
Qualcomm, Incorporated, San Diego, CA (US);
Abstract
Techniques to perform beam-steering and beam-forming to transmit data on a single eigenmode in a wideband multiple-input channel. In one method, a steering vector is obtained for each of a number of subbands. Depending on how the steering vectors are defined, beam-steering or beam-forming can be achieved for each subband. The total transmit power is allocated to the subbands based on a particular power allocation scheme (e.g., full channel inversion, selective channel inversion, water-filling, or uniform). A scaling value is then obtained for each subband based on its allocated transmit power. Data to be transmitted is coded and modulated to provide modulation symbols. The modulation symbols to be transmitted on each subband are scaled with the subband's scaling value and further preconditioned with the subband's steering vector. A stream of preconditioned symbols is then formed for each transmit antenna.