Power Line Communication Device and Method with Frequency Shifted Modem
First Claim
1. A power line communication device for communicating data over a power line, comprising:
- a controller having a memory;
a modem in communication with the controller;
a clock generation circuit configured to provide a first clock output and wherein said controller is operatively coupled to said clock generation circuit;
a first mixer configured to receive the first clock output from said clock generation circuit and a data signal input from said modem and to provide a shifted data signal output to be communicated over the power; and
wherein said controller is configured to receive information from said modem and to cause said clock generation circuit to adjust the first clock output.
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Accused Products
Abstract
A power line communication device for communicating data over a power line in a frequency shifted communication band is provided. One embodiment includes a controller having a memory, a modem in communication with the controller, a clock generation circuit to provide a first clock output controlled by the controller. The embodiment also includes a first mixer configured to receive the first clock output from the clock generation circuit and a data signal input from the modem and to provide a shifted data signal output. The embodiment may also include a second mixer configured to receive a second clock output from the clock generation circuit and an external data signal input and to provide a shifted data signal input to the modem for demodulation. The controller is configured to receive information from the modem and to cause the clock generation circuit to adjust the first and second clock outputs accordingly. The clock generation circuit also may include a voltage controlled oscillator controlled by the controller via a digital to analog converter.
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Citations
39 Claims
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1. A power line communication device for communicating data over a power line, comprising:
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a controller having a memory; a modem in communication with the controller; a clock generation circuit configured to provide a first clock output and wherein said controller is operatively coupled to said clock generation circuit; a first mixer configured to receive the first clock output from said clock generation circuit and a data signal input from said modem and to provide a shifted data signal output to be communicated over the power; and wherein said controller is configured to receive information from said modem and to cause said clock generation circuit to adjust the first clock output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of providing data communications over a power line, comprising:
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receiving a first data signal input from the power line; (a) mixing the data signal input with a first clock signal to provide a shifted data signal input; (b) demodulating the shifted data signal input to provide first data; (c) determining error data; (d) adjusting the first clock signal based on the error data; providing a second clock signal to the modem; and adjusting the second signal based on the error data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A power line communication device for communicating data over a power line, comprising:
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a controller having a memory; a modem in communication with the controller; a clock generation circuit configured to provide a first clock output and a second clock output and wherein said controller is operatively coupled to said clock generation circuit; a first mixer configured to receive the first clock output from said clock generation circuit and a data signal input from said modem and to provide a shifted data signal output; wherein said modem is configured to receive the second clock output; and wherein said controller is configured to receive information from said modem and to cause said clock generation circuit to adjust the first clock output and the second clock output based, at least in part, on said information. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A method of providing data communications, comprising:
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coupling a plurality of devices to each other via a coaxial cable; transmitting a synchronization signal over the coaxial cable to the plurality of devices; at each of the plurality of devices; receiving the synchronization signal; receiving a data signal input from the coaxial cable; mixing the data signal input with a first clock signal to provide a shifted data signal input; demodulating the shifted data signal input to provide first data; determining error data; adjusting the first clock signal based on the error data; providing a second clock signal to a modem; and adjusting the second clock signal based on the error data. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification