Accurate and fast in-service estimation of input bit error ratio of low density parity check decoders

US10078540B2 · kind B2 · utility

Assignee

• Cisco Technology, Inc. · US

Inventors

• Andreas Bisplinghoff · Forchheim, DE
• Stefan Langenbach · Achern, DE

Key dates

• Filing date: Jun 13, 2014
• Grant date: Sep 18, 2018
• Expiry date: Feb 29, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M13/612
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A device receives signals over a communication medium and uses a low density parity check decoder to decode data in the signals. A number of unsatisfied parity checks are counted prior to a first decoding iteration of the low density parity check decoder on a basis of log likelihood ratios computed from the signals. An operational characteristic of the low density parity check decoder is computed based on an accumulated number of unsatisfied parity checks.