System and method for error correcting a received data stream in a concatenated system
US6029264A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1997 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Apr 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/3944
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A received signal is first converted into a digital sequence that may contain "erasures" (or ambiguity symbols) as well as errors. Then iterative decoding is applied in order to eliminate or reduce the erasures. This decoding procedure works effectively with the associated transmitter that adopts a concatenation of an outer coder, a permutation and an inner coder. The principal of the invention is also applicable to a system in which the inner coder is replaced by a "digital modulator" that introduces some constraint, or a channel that introduces some memory such as partial response signaling, intersymbol interference or multipath propagation. The invention can be applied to many existing systems while maintaining "backward compatibility" in the sense that the transmitter side need not be modified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.