Process for the coherent demodulation of a reception signal
US5926511A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Feb 21, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03057
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a process for the coherent demodulation of a reception signal, several coefficients of the channel impulse response are determined beforehand. The coefficients are divided into at least two gain taps and at least one loss tap. The loss taps are utilized for a feedback filter to eliminate a corresponding signal component. The signal cleared up in this manner is estimated in a log-likelihood equalizer on the basis of gain taps. The process is characterized in that neither filter training nor high mathematical effort are required for determining the equalizer coefficients. There is also no error floor for the high frequency band signal. The quantity of operations required per symbol in the detection phase is comparatively small.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.