Patent ID: 7333572
Filing Date: 2008-02-19
Classification: H04L

Abstract:
1. A method for equalization of a data signal which is transmitted via a channel and in which, on the basis of the Viterbi algorithm, transition metrics are determined between trellis states as the distance between a signal value measured at the receiver end and a reconstructed signal value which is characteristic of the state transition and of the channel transmission response, comprising the steps of: estimating L+1 channel parameters h calculating m storing the trellis contributions in a first table memory; storing the decision feedback contributions in a second table memory; before carrying out add compare select (ACS) operations for a specific time step, re-storing of the decision feedback contributions in a third table memory with a state-indexed address; carrying out the ACS operations over multiple time steps, wherein the re-storage from the second to the third table memory being carried out once again in each subsequent time step, and with each reconstruction signal value which is required for the calculation of a transition metric being determined by access to the first table memory and to the third table memory.