Bias removal of radio link quality estimates
AssigneeNokia Corporation
InventorsPetri VAISANEN, Kari MAJONEN, Mika VENTOLA
Life of this patent
Estimating the term…
Abstract
A method for compensating the bias in estimates by utilizing the configured channel estimation filter bank. The method comprises selecting a filter from a predefined set of filters based on channel parameters, and producing at least one radio channel coefficient by applying the selected filter. An input to the filter comprises raw channel estimates, and an output of the filter comprises at least one biased channel coefficient after filtering. The method further comprises producing a radio link quality based on the at least one biased channel coefficient and/or the selected filter. During the estimation, the method comprises removing bias based on the selected filter and/or a filter configuration.
Claims20
An apparatus, comprising:
- at least one processor;
- at least one memory including computer program code;
- the at least one memory and the computer program code configured, with the at least one processor, to cause the apparatus at least to
- select a filter from a predefined set of filters based on channel parameters, and
- produce at least one radio channel coefficient by applying the selected filter, wherein an input to the filter comprises raw channel estimates, and an output of the filter comprises at least one biased channel coefficient;
- and
- the apparatus further comprising an estimator configured to produce a radio link quality estimate based on at least one of the biased channel coefficient and the selected filter,
- wherein, during the estimation, the apparatus is configured to remove bias based on at least one of the selected filter and a filter configuration.
A method, comprising:
- selecting a filter from a predefined set of filters based on channel parameters;
- producing at least one radio channel coefficient by applying the selected filter, wherein an input to the filter comprises raw channel estimates and an output of the filter comprises a channel coefficient that comprises a bias;
- producing a radio link quality estimate based on at least one of the biased channel coefficient and the selected filter;
- and
- during the estimation, removing bias based on at least one of the selected filter and a filter configuration.
A computer program product comprising a computer-readable medium bearing computer program code embodied therein for use with a computer, the computer program code comprising:
- code for selecting a filter from a predefined set of filters based on channel parameters;
- code for producing at least one radio channel coefficient by applying the selected filter, wherein an input to the filter comprises raw channel estimates and an output of the filter comprises a channel coefficient that comprises a bias;
- code for producing a radio link quality estimate based on at least one of the biased channel coefficient and the selected filter;
- and
- code for removing bias, during the estimation, based on at least one of the selected filter and a filter configuration.
Dependencies are inferred from the claim text.