Fully adaptive modem receiver using whitening matched filtering
US5031195A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1989 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Jun 5, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H21/0018
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Fully adaptive modem receiver for data-transmission systems which use trellis-coded modulation (TCM) and comprises an adaptive whitened-matched filter (WMF) and a reduced-state trellis decoder. The WMF consists of an adaptive linear equalizer with fractional-T spaced coefficients, and an adaptive linear predictor. The decoder combines the functions of equalization and TCM decoding. It employs combined intersymbol interference (ISI) and code states which exploit the set-partitioning structure of the underlying TCM code to provide full or reduced-state information about past ISI terms. The decoder branch metric cancels those ISI terms that are not, or are only partially, represented by the trellis states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.