System for enhanced error correction in trellis decoding

摘要

A method of discriminating between equally probable trellis paths surviving in a trellis decoder to select a single output path. The method comprises: windowing over the trellis decoder to view said surviving paths in successive windows, identifying a predetermined feature in the paths as they appear in the successive windows, and eliminating surviving paths having the predetermined feature to leave a single surviving path to form the single output path.