Method of parameter estimation and receiver
AssigneeNokia Corporation
InventorOlli Piirainen
Life of this patent
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Abstract
The invention relates to a method for parameter estimation in a digital radio system receiver, and a receiver. The receiver comprises a detector generating a number describing the probability of a received symbol using soft decision metrics. Mean values of the numbers describing the received symbol probability by which an estimator generates a new channel estimate are generated. As the energy of different symbols varies the channel estimate to be generated is weighted by the symbol energy to be generated. The channel estimate change can be attenuated by averaging or by multiplying the change by a weighting value. The channel estimate of the invention can also be used in the estimation of other data communication parameters whereby, for example, the Doppler error can be corrected.
Claims16
A method for parameter estimation in a digital radio system receiver, the receiver comprising a detector generating a number describing a probability of a received symbol using soft decision metrics, the method comprising the steps of:
- generating a mean value of numbers describing the probability of the received symbol;
- and
- generating a new channel estimate as a parameter utilizing the mean value.
A digital radio system receiver for desired parameter estimation, the receiver comprising:
- a detector configured to generate a number describing a probability of a received signal using soft decision metrics;
- and
- estimation means, operably connected to the detector, for estimating a channel estimate utilizing a mean value generated from numbers describing the probability of the received symbol produced by the detector and the detector being arranged to estimate a desired parameter using the channel estimate.
A digital radio system receiver for desired parameter estimation, the receiver comprising:
- a detector configured to generate a number describing a probability of a received signal using soft decision metrics;
- and
- an estimation unit, operably connected to the detector and configured to estimate a channel estimate utilizing a mean value generated from numbers describing the probability of the received symbol produced by the detector, wherein the detector is arranged to estimate a desired parameter using the channel estimate.
Dependencies are inferred from the claim text.