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. 23, 2007
Filed:
Oct. 16, 2003
Gregory Gene Raleigh, El Granada, CA (US);
Suhas Nagraj Diggavi, Stanford, CA (US);
Vincent Knowles Jones, Iv, Redwood Shores, CA (US);
Arogyaswami Joseph Paulraj, Stanford, CA (US);
Gregory Gene Raleigh, El Granada, CA (US);
Suhas Nagraj Diggavi, Stanford, CA (US);
Vincent Knowles Jones, IV, Redwood Shores, CA (US);
Arogyaswami Joseph Paulraj, Stanford, CA (US);
The Board of Trustees of the Leland Stanford Jr. University, Stanford, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A method for forming an adaptive phased array transmission beam pattern at a base station without any knowledge of array geometry or mobile feedback is described. The approach is immune to the problems which plague methods which attempt to identify received angles of arrival from the mobile and map this information to an optimum transmit beam pattern. In addition, this approach does not suffer the capacity penalty and mobile handset complexity increase associated with mobile feedback. Estimates of the receive vector propagation channels are used to estimate transmit vector channel covariance matrices which form objectives and constraints in quadratic optimization problems leading to optimum beam former solutions for the single user case, and multiple user case. The new invention in capable of substantial frequency re-use capacity improvement in a multiple user cellular network.