Patent ID: 6744814
Filing Date: 2004-06-01
Classification: H04L

Abstract:
A method for processing a received signal from a dispersive channel, said channel having a memory length L and being modeled as a filter having (L+1) taps, indexed zero through L, where each said (L+1) taps has associated therewith a channel coefficient, wherein those channel coefficients whose associated index is in the range one through K are referred to as non tap-selectable coefficients and those (Lâˆ’K) channel coefficients whose associated index is in the range K+1 through L are referred to as (Lâˆ’K) tap-selectable coefficients, said method comprising the steps of:estimating the (L+1) channel coefficients associated with the (L+1) taps by analyzing said received signal; selecting V channel coefficients from the (Lâˆ’K) tap-selectable coefficients which satisfy a predetermined criteria, where V is a number of the channel coefficients selected; processing the K non tap-selectable channel coefficients and the selected V channel coefficients with a high complexity cancellation algorithm; and processing Lâˆ’(K+V) non-selected tap-selectable coefficients with a lower complexity cancellation algorithm.