TRANSCEIVER FRONT-END FOR COMMUNICATION OVER POWER LINES

摘要

Various circuits and methods are disclosed for communications over AC power lines. In one example embodiment, a power line communication circuit includes an analog front end having a data-coupling circuit configured to communicatively couple communication signals to and from a set of AC power lines in the power line communication system. The analog front end also includes a noise reduction circuit that is coupled to the data-coupling circuit. The noise reduction circuit is configured to mitigate noise within a communication frequency band of the communication signals by filtering, from the communication signals, at least one frequency that is located outside of the communication frequency band and that has harmonics located within the communication frequency band and to demodulate data from the communication frequency band of the filtered communication signals.

主权项

1. For use in a power line communication system, a power line communication circuit comprising:
an analog circuit configured and arranged to communicatively couple communication signals over a set of alternating current (AC) power lines in the power line communication system, whereby the communication signals are carried by the power line communication system, and a noise-reducing circuit coupled to the analog circuit and configured and arranged to:
reduce noise within a communication frequency band of the communication signals by filtering certain signals from the communication signals, and thereby reducing an amplitude thereof, the signals corresponding to a first frequency that is located outside of the communication frequency band and that has harmonics located within the communication frequency band, anddemodulate the filtered communication signals in the communication frequency band.