Patent · US Expired

Method for enhancing soft-value information

US6823027B2 · kind B2 · utility

2Cited by

8References

21Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Magnus Malmberg · Skutskär, SE
Philip Mansson · Furulund, SE
Roger Persson · Karlskrona, SE

Key dates

Filing date	Mar 5, 2001
Grant date	Nov 23, 2004
Priority date	—
Expiry date	Jun 4, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH04L25/03318
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A Reduced-State Sequence Estimation (RSSE) method is disclosed, whereby states in a trellis structure associated, for example, with a Viterbi algorithm are partitioned into a plurality of hyper-states. During a hyper-state decision interval, a hyper-soft value is calculated. The calculated hyper-soft value is a measurement of the accuracy of the hyper-state decision made. The calculated hyper-soft value can be used by an equalizer to generate soft-value information for decoding. A soft-value generated from such a hyper-soft value combined with bit soft-value in an RSSE algorithm is significantly more accurate than a soft-value that can be generated for a DFSE algorithm (i.e., without such a hyper-soft value).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.