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UltraComm: High-Speed and Inaudible Acoustic Communication

  • Guoming Zhang
  • Xiaoyu Ji
  • Xinyan Zhou
  • Donglian Qi
  • Wenyuan XuEmail author
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 300)

Abstract

Acoustic communication has become a research focus without requiring extra hardware on the receiver side and facilitates numerous near-field applications such as mobile payment, data sharing. To communicate, existing researches either use audible frequency band or inaudible one. The former gains a high throughput but endures being audible, which can be annoying to users. The latter, although inaudible, falls short in throughput due to the limited available (near) ultrasonic bandwidth (18–22 kHz). In this paper, we achieve both high speed and inaudibility for acoustic communication by modulating the coded acoustic signal (0–20 kHz) on ultrasonic carrier. By utilizing the nonlinearity effect on microphone, the modulated audible acoustic signal can be demodulated and then decoded. We design and implement UltraComm, an inaudible acoustic communication system with OFDM scheme based on the characteristics of the nonlinear speaker-to-microphone channel. We evaluate UltraComm on different mobile devices and achieve throughput as high as 16.24 kbps, meanwhile, keep inaudibility.

Keywords

Ultrasound Inaudible acoustic communication Nonlinearity Device-to-device communication 

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Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2020

Authors and Affiliations

  • Guoming Zhang
    • 1
  • Xiaoyu Ji
    • 1
  • Xinyan Zhou
    • 1
  • Donglian Qi
    • 1
  • Wenyuan Xu
    • 1
    Email author
  1. 1.Zhejiang UniversityHang ZhouChina

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