Communication system
First Claim
1. A communication system comprising:
- an interrogator for transmitting an interrogation signal representing a communication reference time length, and communication serial data that is generated based on the communication reference time length; and
a responder for receiving the interrogating signal from the interrogator and for responding to the interrogation signal, the responder including;
a clock oscillator for outputting clock pulses;
measuring means for measuring the communication reference time length represented by the interrogation signal, the measuring means comprising first counting means for counting the clock pulses output from the clock oscillator during the communication reference time length represented by the received interrogation signal;
setting means for setting a time length based on the communication reference time length measured by the measuring means, the setting means comprising pulse number setting means for setting a pulse number based on a number of clock pulses counted by the first counting means;
generating means for generating a plurality of timing signals based on the time length set by the setting means, the generating means comprising second counting means for counting clock pulses output by the clock oscillator, and for generating one of the timing signals when a number of clock pulses counted by the second counting means reach the pulses number set by the pulse number setting means; and
demodulating means for receiving the interrogating signal from the interrogator and for demodulating the communication serial data represented by the received interrogation signal in response to the timing signals generated by the generating means.
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Accused Products
Abstract
A communication system includes an interrogator for transmitting an interrogation signal generated on the basis of a communication reference time length. A responder is operative for decoding the interrogation signal from the interrogator at a given reception timing. The interrogator transmits a communication reference signal before a transmission of a communication signal. The communication reference signal represents the communication reference time length. The responder measures the communication reference time length represented by the communication reference signal transmitted from the interrogator. The responder sets the reception timing in accordance with the measured communication reference time length.
87 Citations
7 Claims
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1. A communication system comprising:
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an interrogator for transmitting an interrogation signal representing a communication reference time length, and communication serial data that is generated based on the communication reference time length; and a responder for receiving the interrogating signal from the interrogator and for responding to the interrogation signal, the responder including; a clock oscillator for outputting clock pulses; measuring means for measuring the communication reference time length represented by the interrogation signal, the measuring means comprising first counting means for counting the clock pulses output from the clock oscillator during the communication reference time length represented by the received interrogation signal; setting means for setting a time length based on the communication reference time length measured by the measuring means, the setting means comprising pulse number setting means for setting a pulse number based on a number of clock pulses counted by the first counting means; generating means for generating a plurality of timing signals based on the time length set by the setting means, the generating means comprising second counting means for counting clock pulses output by the clock oscillator, and for generating one of the timing signals when a number of clock pulses counted by the second counting means reach the pulses number set by the pulse number setting means; and demodulating means for receiving the interrogating signal from the interrogator and for demodulating the communication serial data represented by the received interrogation signal in response to the timing signals generated by the generating means. - View Dependent Claims (2, 3)
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4. A communication system comprising:
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a) an interrogator for transmitting an interrogation signal representing a communication reference time length, and communication serial data that is generated based on the communication reference time length; and b) a responder for receiving the interrogation signal from the interrogator and for responding to the interrogation signal, the responder including; b1) measuring means for measuring the communication reference time length represented by the interrogation signal; b2) setting means for setting a time length based on the communication reference time length measured by the measuring means; b3) first generating means for generating a plurality of timing signals based on the time length set by the setting means; b4) demodulating means for receiving the interrogation signal from the interrogator and for demodulating the communication serial data represented by the received interrogation signal in response to the timing signals generated by the first generating means; b5) holding means for holding the communication reference time length measured by the measuring means; b6) second generating means for generating transmission serial data when the responder responds to the interrogation signal from the interrogator; and b7) feeding means for feeding the communication reference time length from the holding means to the second generating means when transmission serial data is to be generated, the communication reference time being used by the second generating means as a transmission reference to generate the transmission serial data when the responder responds.
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5. A communication system comprising:
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a) an interrogator for transmitting an interrogation signal representing a communication reference time length, and communication serial data that is generated based on the communication reference time length; and b) a responder for receiving the interrogation signal from the interrogator and for responding to the interrogation signal, the responder including; b1) measuring means for measuring the communication reference time length represented by the interrogation signal; b2) setting means for setting a time length based on the communication reference time length measured by the measuring means; b3) first generating means for generating a plurality of timing signals based on the time length set by the setting means; b4) demodulating means for receiving the interrogation signal from the interrogator and for demodulating the communication serial data represented by the received interrogation signal in response to the timing signals generated by the first generating means; b5) second generating means for generating transmission serial data when the responder responds to the interrogation signal from the interrogator; b6) encoding means for encoding the transmission serial data generated by the second generating means in response to the timing signals generated by the first generating means; b7) holding means for holding the communication reference time length measured by the measuring means until the transmission serial data is generated; and b8) feeding means for feeding the communication reference time length from the holding means to the second generating means when the transmission serial data is generated. - View Dependent Claims (6, 7)
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Specification