William Guyker

US Patent:

62783572, Aug 21, 2001

Filed:

Feb 3, 2000

Appl. No.:

9/497470

Inventors:

Timothy M. Croushore - Greensburg PA
William C. Guyker - Greensburg PA
Walter M. Curt - Harrisonburg VA
Glen K. Shomo - Harrisonburg VA
Chris F. Mullins - Harrisburg VA
James M. Childers - Yorktown VA

Assignee:

Electric Power Research Institute, Inc. - Palo Alto CA

International Classification:

H04M 1104

US Classification:

34031001

Abstract:

An apparatus to establish bi-directional digital communication over a power line network includes a signal launching circuit to impose a digital communication signal onto a power signal carried by a power line network and thereby form a digital communication power signal at a first point in the power line network. The signal launching circuit is configured to position a pulse of the digital communication signal at any phase location of each half cycle of the power signal. A receiver reads the digital communication power signal at a second point in the power line network. A signal processor is connected to the receiver to recover the digital communication signal from the digital communication power signal.