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An Accurate Direction Finding Scheme Using Virtual Antenna Array via Smartphones.

Xiaopu Wang1, Yan Xiong2, Wenchao Huang3

  • 1School of Computer Science and Technology, University of Science and Technology of China, Hefei 230000, China. wangxp88@mail.ustc.edu.cn.

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|November 2, 2016
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Summary
This summary is machine-generated.

This study introduces a novel indoor direction-finding system using smartphones and loudspeakers. It enables accurate navigation by emulating an antenna array with body movement, overcoming complex indoor environments.

Keywords:
antenna array simulationindoor direction findingmultipath effectmultiple signal classification

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Area of Science:

  • Engineering
  • Computer Science
  • Acoustics

Background:

  • Indoor localization often requires specialized hardware or inconvenient fingerprinting methods.
  • Existing techniques present challenges in terms of cost, convenience, and accuracy for daily use.

Purpose of the Study:

  • To develop an accurate, efficient, and lightweight indoor direction-finding system.
  • To enable navigation using commonly available smartphones and loudspeakers.

Main Methods:

  • Emulating a virtual Uniform Antenna Array by moving a smartphone in regular patterns.
  • Utilizing smartphone gyroscope data to mitigate motion pattern variations.
  • Employing Multiple Signal Classification (MUSIC) to determine signal direction and combat multipath effects.

Main Results:

  • The system successfully estimates the angle of arrival for acoustic signals from loudspeakers.
  • Demonstrated reliable performance in diverse and complex indoor environments.
  • Achieved accurate directional guidance for users.

Conclusions:

  • The proposed system offers a practical solution for indoor direction finding.
  • Leveraging everyday smartphones and loudspeakers provides a convenient and accessible alternative to specialized localization systems.
  • The method effectively addresses challenges like virtual antenna array emulation and multipath interference.