Optimizing of channel equalizer
AssigneeNokia Corporation
InventorOlli Piirainen
Life of this patent
Estimating the term…
Abstract
A method for carrying out channel equalization in a radio receiver wherein an impulse response is estimated, noise power is determined by estimating a co-variance matrix of the noise contained in a received signal before prefiltering, and tap coefficients of prefilters and an equalizer are calculated. The method comprises determining the noise power after prefiltering by estimating a noise covariance matrix, after which input signals (416, 418) of the channel equalizer are weighted by weighting coefficients obtained from the noise covariance estimation.
Claims10
A method for carrying out channel equalization in a radio receiver comprising:
- estimating impulse response,
- determining noise power by estimating a covariance matrix of the noise contained in a received signal before prefiltering,
- calculating tap coefficients of prefilters and an equalizer,
- determining the noise power after prefiltering by estimating a noise variance, and
- weighting input signals of the channel equalizer by weighting coefficients obtained by estimating the noise variance.
A radio receiver comprising:
- means for estimating an impulse response,
- means for determining noise power of a received signal by estimating a covariance matrix of the noise contained in the received signal before prefiltering,
- means for calculating tap coefficients of prefilters and a channel equalizer,
- means for determining the noise power after prefiltering by estimating a noise variance, and
- means for weighting input signals of the channel equalizer by weighting coefficients obtained from the noise variance estimation.
Dependencies are inferred from the claim text.