Patent · US Expired

Alternate mark inversion (AMI) receiver

US4665531A · kind A · utility

15Cited by
6References
4Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJan 7, 1986
Grant dateMay 12, 1987
Priority date
Expiry dateJan 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.