Digital two way automatic communication system (TWACS) outbound receiver and method
First Claim
1. In a two-way automatic communications system (TWACS) used by an electrical utility in which outbound messages are sent from the utility to a consumer and inbound messages are sent from the consumer to the utility, the respective outbound and inbound messages being sent and received over the utility'"'"'s power distribution system, a receiver for detecting the outbound messages, said receiver comprising:
- an analog filter component receiving the analog outbound signal including an outbound message to provide a filtered signal,an A/D converter component converting the filtered signal to a corresponding digital signal and providing the corresponding digital signal; and
a digital processor executing;
a digital preprocessor component receiving the corresponding digital signal, preprocessing the received corresponding digital signal to provide a preprocessed discretization digital signal; and
a digital symbol determination component receiving the preprocessed discretization digital signal and providing a noise product signal, said digital symbol determination component including a preamble detector providing a symbol synchronization signal corresponding to the preprocessed discretization digital signal, said digital symbol determination component digitally demodulating the received preprocessed discretization digital signal by sampling according to the symbol synchronization signal and according to the noise product signal to provide the outbound message.
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Accused Products
Abstract
A receiver and method for a transponder of a two-way automatic communications system (TWACS) used by an electrical utility in which analog outbound messages are sent from the utility to a consumer and inbound, reply messages are sent from the consumer to the utility. The receiver and method enable a transponder to detect the outbound messages and include A/D conversion and digital processing for demodulating a digitized signal and providing the outbound message.
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Citations
25 Claims
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1. In a two-way automatic communications system (TWACS) used by an electrical utility in which outbound messages are sent from the utility to a consumer and inbound messages are sent from the consumer to the utility, the respective outbound and inbound messages being sent and received over the utility'"'"'s power distribution system, a receiver for detecting the outbound messages, said receiver comprising:
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an analog filter component receiving the analog outbound signal including an outbound message to provide a filtered signal, an A/D converter component converting the filtered signal to a corresponding digital signal and providing the corresponding digital signal; and a digital processor executing; a digital preprocessor component receiving the corresponding digital signal, preprocessing the received corresponding digital signal to provide a preprocessed discretization digital signal; and a digital symbol determination component receiving the preprocessed discretization digital signal and providing a noise product signal, said digital symbol determination component including a preamble detector providing a symbol synchronization signal corresponding to the preprocessed discretization digital signal, said digital symbol determination component digitally demodulating the received preprocessed discretization digital signal by sampling according to the symbol synchronization signal and according to the noise product signal to provide the outbound message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A two-way automatic communications system (TWACS) used by an electrical utility comprising:
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a substation sending analog outbound messages from the utility to a consumer; a transponder sending inbound messages from the consumer to the utility, the respective outbound and inbound messages being sent and received over the utility'"'"'s power distribution system; and a receiver included in the transponder for enabling the detection of the outbound messages, said receiver comprising; an analog filter component receiving the analog outbound signal including an outbound message to provide a filtered signal, an A/D converter component converting the filtered signal to a corresponding digital signal and providing the corresponding digital signal; and a digital processor executing; a digital preprocessor component receiving the corresponding digital signal, preprocessing the received corresponding digital signal to provide a preprocessed discretization digital signal; and a digital symbol determination component receiving the preprocessed discretization digital signal and providing a noise product signal, said digital symbol determination component including a preamble detector providing a symbol synchronization signal corresponding to the preprocessed discretization digital signal, said digital symbol determination component digitally demodulating the received preprocessed discretization digital signal by sampling according to the symbol synchronization signal and according to the noise product signal to provide the outbound message. - View Dependent Claims (15, 16, 17, 18, 19)
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20. In a two-way automatic communications system (TWACS) used by an electrical utility in which analog outbound messages are sent from the utility to a consumer and inbound messages are sent from the consumer to the utility, the respective outbound and inbound messages being sent and received over the utility'"'"'s power distribution system, a method for detecting the outbound messages comprising:
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receiving the analog outbound signal including an outbound message; converting the received analog outbound signal to a corresponding digital signal; preprocessing the corresponding digital signal to provide a preprocessed discretization digital signal; providing a noise product signal and providing a symbol synchronization signal corresponding to a preamble of the preprocessed discretization digital signal; digitally demodulating the preprocessed discretization digital signal by sampling according to the symbol synchronization signal and according to the noise product signal to provide the outbound message. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification