Patent ID: 6961391
Filing Date: 2005-11-01
Classification: H04L

Abstract:
1. A signal processor arranged and constructed to recover a scquence of symbols from a received signal, comprising: a symbol selector for selecting a symbol based on the received signal over a time period including previous symbol periods, a current symbol period, and a number of additional symbol periods, where said number of additional symbol periods depend on an inter symbol interference associated with the received signal; and a trellis processor for providing, for each symbol period, said symbol selector with one surviving path to each of a plurality of symbol states, said plurality of symbol states corresponding one to one to a plurality of symbols, said one surviving path including a sequence of branches, one branch for each symbol period, said one branch corresponding to a transition from one to another of said plurality of symbol states, wherein said trellis processor determines said one surviving path according to a metric for each of a plurality of paths to each of said plurality of symbol states, said metric corresponding to a correlation between the received signal and a template for each branch that is part of said each of a plurality of paths.