System and method for wirelessly transmitting and receiving digital tokens for use in electronic gameplay
First Claim
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1. A digital data transmitting system using acoustic tones, the system comprising:
- a) at least one generator generating digital data;
b) a modulator system, said modulator system modulating a plurality of pure tone notes with the digital data, wherein a first set of harmonics in the plurality of pure tone musical notes are at integer multiples of a fundamental frequency; and
c) at least one loudspeaker, the loudspeaker transmitting the modulated tones.
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Abstract
A system and a method for the transmission and reception of digital data wirelessly using acoustic tones comprises a device having an encoder, a modulator system, a demodulator system, and a decoder. The modulator system uses a plurality of acoustical tones with a fundamental frequency and multiple harmonics that are amplitude modulated. The received signal is demodulated and detected by quadrature detectors comprising replicas of the acoustical tones. An extended Golay code based decoder is used for correcting errors occurring during transmission.
95 Citations
43 Claims
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1. A digital data transmitting system using acoustic tones, the system comprising:
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a) at least one generator generating digital data; b) a modulator system, said modulator system modulating a plurality of pure tone notes with the digital data, wherein a first set of harmonics in the plurality of pure tone musical notes are at integer multiples of a fundamental frequency; and c) at least one loudspeaker, the loudspeaker transmitting the modulated tones. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for transmitting digital data using acoustic tones, the method comprising:
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a) generating digital data; b) modulating a plurality of pure tone notes with the digital data, wherein a first set of harmonics in the plurality of pure tone musical notes are at integer multiples of a fundamental frequency; and c) transmitting the modulated tones through a loudspeaker. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A receiver for receiving acoustic tones modulated by digital data, the receiver comprising:
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a) a plurality of quadrature detectors, one for each of a plurality of tones, for recovering a baseband signal from a bandpass signal, said bandpass signal comprising the plurality of amplitude modulated tones; b) a data detector for detecting data in the baseband signal following a first pseudo random code sequence and a second pseudo random code sequence; c) a correlator for extracting a plurality of message bits following the first pseudo random code sequence and a plurality of correction bits following the second pseudo random code sequence; and d) a decoder for determining the number of errors in the message bits. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method for receiving acoustic tones modulated by digital data, the method comprising:
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a) recovering a baseband signal from a plurality of modulated tones; b) detecting data in the baseband signal following a first pseudo random code sequence and a second pseudo random code sequence; c) extracting a plurality of message bits from the data following the first pseudo random code sequence and correction bits following the second pseudo random code sequence; and d) determining the number of errors in the message bits by a decoder. - View Dependent Claims (40, 41, 42, 43)
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Specification