Communication device and method(s)
First Claim
Patent Images
1. A transmitting arrangement adapted to provide communication and/or identification, said arrangement comprising:
- transmitter means adapted to transmit a communication signal via a carrier signal having a frequency selected from a set of possible carrier signal frequencies;
selection means for selecting the carrier signal frequency from the set of possible carrier signal frequencies; and
generating means for providing the set of possible carrier signal frequencies for use by the selection means;
whereinthe communication signal is transmitted, at each transmission, at a newly selected carrier signal frequency.
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Abstract
The present invention relates to the areas of communication and/or identification of remote devices (active or passive). The invention has application where there is a need to identify or communicate with more than one remote device. The remote device may be embodied as a transmitter arrangement, transducer, transponder or responder. In particular, the present invention calls for each remote device to include a transmitter means in which, at each transmission, a carrier frequency or medium is newly selected.
97 Citations
34 Claims
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1. A transmitting arrangement adapted to provide communication and/or identification, said arrangement comprising:
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transmitter means adapted to transmit a communication signal via a carrier signal having a frequency selected from a set of possible carrier signal frequencies; selection means for selecting the carrier signal frequency from the set of possible carrier signal frequencies; and generating means for providing the set of possible carrier signal frequencies for use by the selection means;
whereinthe communication signal is transmitted, at each transmission, at a newly selected carrier signal frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 30, 32, 33)
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22. A system adapted to provide communication and/or identification, the system comprising:
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at least two remote transmitter arrangements, each arrangement comprising transmitter means adapted to transmit a communication signal via a carrier signal having a frequency selected from a set of possible carrier signal frequencies; selection means for selecting the carrier signal frequency; frequency generating means for providing the set of possible carrier signal frequencies for use by the transmitter means;
where the communication signal is transmitted, at each transmission, at a newly selected carrier signal frequency; andsystem receiver means including at least two receiver channels, each channel being adapted to demodulate a corresponding communication signal sent by a transmitter arrangement at a corresponding carrier signal frequency. - View Dependent Claims (24, 25, 26, 34)
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27. A method of communication between an interrogator and at least one remote device, said method comprising the steps of:
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each remote device generating a first signal for transmission via a carrier signal at a frequency selected by each respective remote device from a respective predetermined set of carrier signal frequencies, the frequency of the carrier signal being determined by each remote device; transmitting said first signal from each remote device to the interrogator; and generating and transmitting the first signal successively or repetitively at each transmission via a new carrier signal. - View Dependent Claims (28, 29, 31)
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Specification