Method and arrangement for demodulating data symbols
US6269116A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1998 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Sep 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/0356
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method and an arrangement for demodulating data symbols (d.sub.1 -d.sub.N) having been transmitted through a communication channel, particularly a channel suffering from one or more impairments. Received signal samples (.rho.), representing the sent data symbols (d.sub.1 -d.sub.N), are stored (310) and demodulated in both the forward (320) and the backward direction (330), via a demodulator/equaliser. In course of the demodulations are produced a first (S.sub.F) and a second (S.sub.B) respective set of soft values (s.sub.k.sup.F ; s.sub.k.sup.B), which each is associated with a certain data symbol (d.sub.k). (340) From every pair of soft values (s.sub.k.sup.F ; s.sub.k.sup.B) is then determined a joint soft value (S.sub.k.sup.J), which e.g. may be utilised for deriving a resulting set of data symbols (d.sub.1 -d.sub.N) or for directly decoding the payload information contained in the data symbols (d.sub.1 -d.sub.N).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.