Alternate mark inversion (AMI) receiver
US4665531A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1986 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Jan 7, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/22
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An AMI signals receiver generates a logic signal stream representative of AMI encoded information signals which have traversed a transmission medium. Adaptive compensation circuits are responsive to characteristics of the received AMI signals for generating a bipolar signal ideally corresponding to the transmitted AMI signal but in practice includes noise primarily caused by near-end crosstalk. An apparent improvement in the signal-to-noise ratio is achieved by generating a unipolar signal from instant and last amplitude samples of the bipolar signal and thereafter differentially decoding a binary signal representation of the unipolar signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.