| 摘要 |
An equalizer apparatus comprises a first filter ( 406 ) having a first respective plurality of filter coefficients, a channel model filter ( 414 ) having a plurality of model filter coefficients, and an adaptive algorithm unit ( 416 ). The adaptive algorithm unit ( 416 ) is arranged to adapt at least a first predetermined number of the first respective plurality of filter coefficients and at least a second predetermined number of the plurality of model filter coefficients in response to an error signal (e) corresponding to a difference in filter output signals from the first filter and the channel model filters ( 406, 414 ). The adaptive algorithm unit ( 416 ) operates in accordance with a respective state channel estimation technique. The respective state channel estimation technique is adapted so as to reduce a number of states allocatable to at least one of the plurality of state-defining taps, thereby reducing an overall number of states definable associated with the plurality of state-defining taps. The channel model filter ( 414 ) is adapted a number of times corresponding to the reduced overall number of states. |
