Frequency hopping spread spectrum passive acoustic wave identification device
First Claim
1. A communication method, comprising:
- (a) providing a representation of an information pattern having a plurality of degrees of freedom;
(b) imposing the information pattern as a set of time domain parameters on a signal having at least as many excitation conditions as degrees of freedom of the information pattern, to produce an information communication signal;
(c) transmitting the information communication signal;
(d) receiving the information communication signal; and
(e) demodulating the received information communication signal to determine the set of time domain parameters from a set of respective baseband phase-amplitude responses.
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Accused Products
Abstract
A system and method for interrogating a passive acoustic transponder, producing a transponder signal having characteristic set of signal perturbations in response to an interrogation signal, comprising a signal generator, producing an interrogation signal having a plurality of differing frequencies; a receiver, for receiving the transponder signal; a mixer, for mixing the transponder signal with a signal corresponding to the interrogation signal, to produce a mixed output; an integrator, integrating the mixed output to define an integrated phase-amplitude response of the received transponder signal; and an analyzer, receiving a plurality of integrated phase-amplitude responses corresponding to the plurality of differing frequencies, for determining the characteristic set of signal perturbations of the passive acoustic transponder.
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Citations
19 Claims
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1. A communication method, comprising:
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(a) providing a representation of an information pattern having a plurality of degrees of freedom; (b) imposing the information pattern as a set of time domain parameters on a signal having at least as many excitation conditions as degrees of freedom of the information pattern, to produce an information communication signal; (c) transmitting the information communication signal; (d) receiving the information communication signal; and (e) demodulating the received information communication signal to determine the set of time domain parameters from a set of respective baseband phase-amplitude responses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A communication system, comprising:
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(a) an input receiving a representation of an information pattern having a plurality of degrees of freedom; (b) a modulator configured to modulate the information pattern as a set of time domain parameters on a signal having at least as many excitation conditions as degrees of freedom of the information pattern, to produce an information communication signal; (c) a demodulator configured to demodulate the received information communication signal to determine the set of time domain parameters from a set of respective demodulated baseband phase-amplitude response; and (d) an analyzer configured to regenerate the information pattern.
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Specification