Method for transmitting and receiving signals over transmission power lines
First Claim
1. A method for sending and receiving reference and data signals on a AC voltage wave of a transmission line using sending and receiving means comprising the steps of:
- forming a reference channel and data channels and setting the reference and data channels to each cycle of the AC voltage wave for transmission in both sending and receiving means,superposing by means of the sending means, a reference transmission signal onto said reference channel and modulated data transmission signals onto said data channels in said sending means, andreceiving said reference transmission signal and data transmission signals in the receiving means by separation from the AC voltage wave for transmission, and comparing the amplitude and phase of the reference transmission signal received in the reference channel and amplitude and phase of the data transmission signals received in the data channels for monitoring the data transmission signals received in the data channels for monitoring the data transmission signals.
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Accused Products
Abstract
A transmission signal sending and receiving method using the steps of setting the reference channel and data channels in each cycle of the AC voltage wave for transmission in the sending and receiving means, superposing the reference transmission signal onto the reference channel and the modulated data transmission signals onto the data channels in the sending means, receiving the reference transmission signal and data transmission signals by being separated from the AC voltage wave for transmission in the receiving means, and monitoring data transmission signals by comparing the level and phase of the reference transmission signal received by the reference channel with those of the data transmission signals received in the data channels, and thereby comparing the reference transmission signal with the data transmission signals received in each cycle of the AC voltage wave for transmission.
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Citations
5 Claims
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1. A method for sending and receiving reference and data signals on a AC voltage wave of a transmission line using sending and receiving means comprising the steps of:
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forming a reference channel and data channels and setting the reference and data channels to each cycle of the AC voltage wave for transmission in both sending and receiving means, superposing by means of the sending means, a reference transmission signal onto said reference channel and modulated data transmission signals onto said data channels in said sending means, and receiving said reference transmission signal and data transmission signals in the receiving means by separation from the AC voltage wave for transmission, and comparing the amplitude and phase of the reference transmission signal received in the reference channel and amplitude and phase of the data transmission signals received in the data channels for monitoring the data transmission signals received in the data channels for monitoring the data transmission signals. - View Dependent Claims (2, 3, 4, 5)
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Specification