Power line network system and method
First Claim
1. A circuit comprising:
- a line driver configured and arranged to couple data-carrying symbols over a power line, via a waveform, that carries an alternating current signal having a frequency or phase that varies, relative to a frequency or phase of previous cycles of the alternating current signal, the data-carrying symbols corresponding to respective information signals;
a signal-monitoring circuit configured and arranged for monitoring variations in the alternating current signal;
an encoding circuit configured and arranged to provide encoded parameters that define, at least in part, data useful for providing steps of the waveform to account for the variations; and
a logic circuit configured and arranged to respond to the encoding circuit by feeding the line driver with stepped data that is processed for modulating the alternating current signal of the power line with the data-carrying symbols.
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Accused Products
Abstract
Various aspects of the instant disclosure are directed towards communicating symbols over a power line carrying alternating current, based upon frequency variations in the alternating current. In accordance with some embodiments, a line driver couples data-carrying symbols over the power line, via a waveform. Variations in the alternating current are monitored and used for accessing a lookup table that stores data entries that define data useful for providing steps of the waveform. The accessed data entries are used to drive a line driver with stepped data, and therein modulating alternating current on the power line with the data-carrying symbols at a frequency that is tied to the frequency of the alternating current.
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Citations
20 Claims
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1. A circuit comprising:
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a line driver configured and arranged to couple data-carrying symbols over a power line, via a waveform, that carries an alternating current signal having a frequency or phase that varies, relative to a frequency or phase of previous cycles of the alternating current signal, the data-carrying symbols corresponding to respective information signals; a signal-monitoring circuit configured and arranged for monitoring variations in the alternating current signal; an encoding circuit configured and arranged to provide encoded parameters that define, at least in part, data useful for providing steps of the waveform to account for the variations; and a logic circuit configured and arranged to respond to the encoding circuit by feeding the line driver with stepped data that is processed for modulating the alternating current signal of the power line with the data-carrying symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for coupling data-carrying symbols over a power line that carries an alternating current signal having a frequency or phase that varies, relative to a frequency or phase of previous cycles of the alternating current signal, the data-carrying symbols corresponding to respective information signals, the method comprising:
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monitoring variations in the alternating current signal; using an encoding circuit to define, at least in part, data useful for providing steps of a waveform; in response to the monitored variations in the alternating current signal, feeding a line driver with stepped data that is processed for modulating the alternating current signal of the power line with the data-carrying symbols, wherein the steps are provided by using a feedback control loop to account for the monitored variations in the alternating current signal; and coupling the data-carrying symbols over the power line, via the waveform corresponding to the stepped data. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification