Patent Document ID: 8503508
Application ID: 12743727
Patent Flag: 1

Claim One:
1. A method implemented by a Generalized Rake (G-Rake) receiver for estimating an improved impairment covariance matrix, said method comprising: providing a plurality of despread pilot symbols representative of a received signal received by the G-Rake receiver; determining, by a processing circuit, an estimate of an impairment covariance matrix R for said received signal based on the plurality of despread pilot symbols; determining an estimate of scaling parameters α, β for said estimate of R according to a weighted least squares estimate based on the color of a residual noise vector for said estimate of the impairment covariance matrix R, wherein said residual noise vector is determined based on the determined estimate of the impairment covariance matrix and the weighted least squares estimate, and determining an improved estimate of said impairment covariance matrix based on at least said weighted least squares estimate.