公开(公告)号：US12266859B2

公开(公告)日：2025-04-01

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 ,  H01Q1/24

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.