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Unbalanced Hybrid AOA/RSSI Localization for Simplified Wireless Sensor Networks.

Anh Tuyen Le1, Le Chung Tran1, Xiaojing Huang2

  • 1School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong 2522, Australia.

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|July 15, 2020
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Summary
This summary is machine-generated.

This study simplifies wireless sensor networks for source positioning by using one angle-of-arrival (AOA) and multiple received signal strength indicator (RSSI) measurements. This 1AOA/nRSSI method reduces anchor complexity while maintaining localization precision.

Keywords:
angle of arrival (AOA)positioningreceived signal strength indicator (RSSI)target localizationwireless sensor network (WSN)

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Area of Science:

  • Wireless Sensor Networks (WSN)
  • Localization and Positioning Systems
  • Signal Processing

Background:

  • Hybrid angle-of-arrival (AOA) and received signal strength indicator (RSSI) localization offers synchronization-free positioning.
  • Conventional methods require complex anchor hardware (large antenna arrays) for AOA estimation, complicating wireless sensor networks.
  • Simplifying WSNs for localization is crucial for practical deployment.

Purpose of the Study:

  • To propose a simplified hybrid localization method (1AOA/nRSSI) reducing WSN complexity.
  • To enable localization using a single master anchor for AOA and multiple simple anchors for RSSI.
  • To evaluate the performance and precision of the proposed unbalanced integration method.

Main Methods:

  • Developed an unbalanced integration scheme: 1AOA/nRSSI.
  • Transformed 1AOA/1RSSI measurements into virtual anchors.
  • Applied least squares and subspace methods for localization using integrated measurements.
  • Evaluated the impact of angular and distance measurement errors.

Main Results:

  • The 1AOA/nRSSI method significantly simplifies WSN anchor requirements.
  • Achieved localization precision comparable to traditional nAOA/nRSSI networks.
  • Performance is maintained with a slightly increased number of simple anchors.

Conclusions:

  • The proposed 1AOA/nRSSI method offers a practical and simplified approach to WSN localization.
  • This technique reduces hardware complexity without sacrificing localization accuracy.
  • It presents a viable alternative for efficient source positioning in WSNs.