Short-range ultrasonic digital communications in air

@article{Li2008ShortrangeUD,
  title={Short-range ultrasonic digital communications in air},
  author={Chuan Li and D. A. Hutchins and R. J. Green},
  journal={IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control},
  year={2008},
  volume={55},
  pages={908-918}
}
The use of ultrasound in air as a means of communicating digital signals is demonstrated. The work uses capacitive transducers with a useful bandwidth to transmit digitally coded signals across an air gap in the laboratory, using three of the common methods used in digital communications. These are on-off keying (OOK), binary frequency-shift keying (BFSK), and binary phase shift keying (BPSK). All three methods are simulated numerically using the available bandwidth of the transducer systems… CONTINUE READING
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