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:
Dec. 25, 2012
Filed:
Mar. 03, 2006
Hans Dieter Schotten, Nuremberg, DE;
Jay Rodney Walton, Carlisle, MA (US);
Hans Dieter Schotten, Nuremberg, DE;
Jay Rodney Walton, Carlisle, MA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
Techniques for transmitting data with space-time scrambling in cellular systems (e.g., CDMA systems) are described. At least one stream of data symbols is generated, mapped to one or more physical channels, and spread with channelization codes for the physical channels. Space-time scrambling is performed on the at least one stream of data symbols to generate at least two streams of output chips. The space-time scrambling may be achieved by performing matrix multiplication with a sequence of matrices. For each time interval in which space-time scrambling is performed, a matrix may be selected (e.g., based on a scrambling code for a base station), and data to be sent in the time interval is multiplied with the selected matrix. The matrices used for space-time scrambling may be defined and selected in various manners. The streams of output chips are processed and transmitted from respective transmit antennas.