H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/28
H04B 7/00 (2006.01) G05D 23/19 (2006.01) H04Q 9/14 (2006.01) H04H 1/00 (2006.01)
Patent
CA 1149023
ABSTRACT The inventor discloses a bidirectional communication system for electric power load management and distribution automation application, and the like, wherein outgoing control signals to a plurality of remotely located receivers and trans- mitters are sent using an existing standard AM broadcast station using small angle subaudible quadrature modulation. The broad- cast signal is detected by narrowband synchronous receivers phase-locked to the carrier component of the broadcast station. The radio frequencies of the plurality of reverse link trans- mitters are closely spaced and synthesized from frequency of said broadcast carrier and their time of transmission, digital bit streams, and message frames are all synchronized from the broadcast signal. The broadcast station thereby orchestrates all communication activity to and from the plurality of remote locations to optimize traffic flow and miximize a priori information to all components to significantly increase reliability. A unique fast Fourier transform processor sychronized by the broadcast station is employed in the central receiver to detect back link transmission.
362537
Fetherstonhaugh & Co.
Mcgraw-Edison
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