Method and apparatus for turbo code decoding
US8230311B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2008 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | May 25, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/6588
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for turbo code decoding are provided to reduce memory consumption during calculation of state metrics. In an embodiment of a turbo code decoder, a natural recursion unit comprises a plurality of add-compare-select (ACS) units performing natural recursion operations to generate a state metric. The original state metric is then converted to a differential metric before being stored into a memory device. The differential metric contains less data than the state metric so that memory consumption is reduced. To restore the original state metric from the differential metric, a plurality of revival units operating in parallel is provided. Thereby, the state metric is reacquired from the differential metric, and a Log Likelihood Recursion (LLR) operation is accordingly performed by an LLR unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.