Pulse or digital communications – Repeaters – Testing
Patent
1986-04-16
1989-03-21
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375 96, 375103, 340310R, 371 67, H04B 354, H04L 2718
Patent
active
048151068
ABSTRACT:
A power line communication system specially designed for use in local area network (LAN) configurations has receiver and transmitter sections for fast, highly reliable data communication. The receiver includes controlled adaptive second order filters for ensuring data reception in virtually any signal environment having noise and distortion characteristics, especially alternating current (AC) power lines. A wideband phase shift-keyed (PSK) carrier is impressed on the transmission medium, the carrier having power spread approximately uniformly across a useful frequency bandwidth. A transmitter section is arranged for adaptive feedback control of the transmitted signal power, so as to prevent possible damage to the transmitter when the transmission medium impedance is low. A logic control circuit provides a correlation count of a received signal in comparison with a known reference signal in order to effectively achieve phase synchronization between the receiver and transmitter.
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"The Use of Power Line Carrier Technology in EMCS ", Apr. 1, 1982, prepared by Newcomb & Boyd, Consulting Engineers.
Propp David L.
Propp Michael B.
Adaptive Networks, Inc.
Griffin Robert L.
Huseman Marianne
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