Apparatus and method for power line communication (PLC)
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United States of America Patent
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Sep 11, 2001
Grant Date -
N/A
app pub date -
Dec 20, 1999
filing date -
Dec 20, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
The invention provides a transmitter and a signal for communicating information via a power line. The signal comprises a superset and the superset comprises a plurality of tone sets. The superset is characterized by the relationship: ##EQU1## wherein t is time, i is a tone set index, k is a tone index, and wherein f.sub.ik represents the frequency of the kth tone of the ith user, and wherein M is the number of tones per tone set, .alpha..sub.k, .beta..sub.k, are signal amplitudes, and .phi..sub.k, .theta..sub.k are phase offsets. The signal is characterized by a spectral shape exhibiting a plurality of main lobes within a harmonic interval, each of the main lobes corresponding to a different tone set.
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