公开(公告)号：US20220181791A1

公开(公告)日：2022-06-09

申请号：US17457486

申请日：2021-12-03

Applicant: Nokia Solutions and Networks Oy

Inventor： Sivarama VENKATESAN ,  Jaakko Eino Ilmari VIHRIÄLÄ ,  Olli Juhani PIIRAINEN ,  Markus MYLLYLÄ

IPC: H01Q21/06

Abstract: This specification relates to systems and methods for determining eigenvalues and eigenvectors of a covariance matrix, for example for use in eigen-beamforming in MIMO systems. According to a first aspect of this specification, there is describes a method comprising: receiving an input covariance matrix; and determining one or more eigenvalues and/or eigenvectors of the matrix iteratively using gradient ascent, wherein each iteration of the gradient ascent has a step size, μ, that maximises a Rayleigh quotient along the gradient.