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:
Oct. 17, 2006
Filed:
Jul. 23, 2002
Hassan El Nahas El Homsi, Paris, FR;
Hassan El Nahas El Homsi, Paris, FR;
Nortel Networks Limited, St. Laurent, CA;
Abstract
A base station having N transmission antennas () broadcasts M beacon signals (CPICH, CPICH), with 1<M<N. Each beacon signal is associated with a distribution vector (a, b) with N components and is applied to each of the antennas after weighting by a component of this vector. A mobile terminal in communication with the base station evaluates the reception of the M beacon signals so as to determine feedback data communicated to the base station. The latter causes the distribution vectors associated with the M beacons to vary over time, and processes the feedback data successively received so as to determine a respective weighting coefficient (w−w) for each of the N antennas relative to the mobile terminal. A transmitted dedicated radio signal destined for the mobile terminal is applied to each of the N transmission antennas after weighting by the coefficient determined for this antenna.