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:
May. 20, 2003
Filed:
Feb. 27, 2001
Seppo Hämäläinen, Espoo, FI;
Jussi Vepsäläinen, Helsinki, FI;
Nokia Networks Oy, Espoo, FI;
Abstract
A CDMA system transmits from a base station to a plurality of mobile stations or from mobile station to base station on a shared frequency band, each mobile station's data being spread by a different spreading code chosen from a set of orthogonal codes. Each receiver in base station or mobile station correlates for its intended data by despreading the signal using its particular one of the orthogonal codes. Under certain transmission delays, the effects of orthogonality may diminish and another mobile station's signal may cross-correlate with a mobile station's signal. If not all of the orthogonal codes are in use, the present invention determines another selection of orthogonal codes that yields lower cross-correlation under current delay conditions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile