Multi-level digital data regeneration system

Details Multi-level digital data regeneration system Multi-level digital data regeneration system

1992-10-30

1994-03-15

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 76, 375 20, H04L 2560

Patent

active

052951553

ABSTRACT:
An adaptive regeneration system is provided for reconstructing a signal received in the form of a multi-level composite data and clock signal which has been degraded with respect to amplitude and timing. The system includes a local clock circuit for outputting a plurality of phase-delayed local clock signals, and a clock recovery circuit for receiving the received multi-level signal and the plurality of phase-delayed clock signals and extracting a phase-delayed local clock signal which most accurately represents the phase shift between the received multi-level signal and the local clock signal. A threshold level selection circuit receives the extracted phase-delayed local clock signal and the received multi-level signal and outputs in real time a data amplitude reading and a plurality of multi-level threshold levels corresponding to the amplitude levels of the received multi-level signal. A data regenerator receives the data amplitude reading, the plurality of multi-level threshold levels and the extracted phase-delayed signal and reconstructs and outputs the received multi-level signal essentially in its originally transmitted form.

REFERENCES:
patent: 4403330 (1983-09-01), Meyer
patent: 4821286 (1989-04-01), Graczyk et al.
patent: 5022056 (1991-06-01), Henderson et al.
patent: 5204879 (1993-04-01), McConnell
"Base Digital Transmission", Transmission Systems for Communications, AT&T Bell Labs, pp. 703-714.

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