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:
Feb. 19, 2013
Filed:
Mar. 16, 2010
Beamforming methods and systems employing measured power at a receiver to perform channel estimation
Sriram Lakshmanan, Atlanta, GA (US);
Karthikeyan Sundaresan, Howell, NJ (US);
Sriram Lakshmanan, Atlanta, GA (US);
Karthikeyan Sundaresan, Howell, NJ (US);
NEC Laboratories America, Inc., Princeton, NJ (US);
Abstract
Beamforming methods and systems are described in which differential channel estimation can be computed based on measured power at receiver. Simultaneous activation of antennas in separate pairs can be used to determine relative phases of antennas with respect to a reference antenna based on the power measurements. In turn, the beam forming signals can be weighted in accordance with the relative phases to adapt the signals to a multipath environment. Existing power measurement capabilities of conventional receivers can be employed to achieve approximate channel estimates.