Power-line digital communication system
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United States of America Patent
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-
Aug 19, 2003
Grant Date -
N/A
app pub date -
May 23, 2001
filing date -
Nov 24, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of transmitting data over power lines, a decoder of the transmitted data, and a lighting control system that uses the method. The data are represented as symbols that are encoded in groups of successive bursts of alternating signals, with each burst assigned one of M frequencies. Upon reception, the groups are decoded by a decoder that converts the received bursts into a binary form which is correlated with M binary reference signals by XORing and counting the resulting pulses up or down. The correlation values are added separately for each possible symbol value, with the highest score indicating the decoded symbol.
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