| 摘要 |
A method of controlling an adaptive filter in a data channel carrying a signal from which data is to be recovered, the filter having an associated coefficient store and a coefficient temporary store, the method comprising the steps of: a) applying filter coefficients from the coefficient store to the adaptive filter; b) adapting the filter coefficients of the adaptive filter in response to the signal on the channel; c) saving the filter coefficients from the adaptive filter to the temporary store; d) monitoring at least one signal parameter indicative of signal quality and, if the parameter does not cross a predetermined threshold indicative of coefficient maladaption, then updating the coefficient store with the coefficients from the temporary store and if the parameter crosses the predetermined threshold indicative of coefficient maladaption, then the coefficient store is not updated with the coefficients from the temporary store; and e) repeating steps a) to d).
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