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A Novel Experiment-free Site-specific TDoA Localization Performance-Evaluation Approach.

Xiaokang Ye1, José Rodríguez-Piñeiro1, Yuan Liu1

  • 1College of Electronics and Information Engineering, Tongji University, Shanghai, 200082 China.

Sensors (Basel, Switzerland)
|February 21, 2020
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Summary

This study introduces an integrated approach to evaluate Time Difference of Arrival (TDoA) localization systems in complex environments. The method uses radio propagation graphs and signal emulation, offering a cost-effective, experiment-free performance evaluation.

Keywords:
channel impulse response (CIR)performance evaluationpropagation graphsource localizationtime difference of arrival (TDoA)universal software-defined radio peripheral (USRP)

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Area of Science:

  • Signal Processing
  • Wireless Communication
  • Localization Technology

Background:

  • Time Difference of Arrival (TDoA) is crucial for source localization.
  • Existing performance evaluation methods for TDoA systems are often limited to simple scenarios or are costly and inefficient.
  • Complex environments pose challenges for accurate TDoA system evaluation.

Purpose of the Study:

  • To propose an integrated, experiment-free approach for evaluating TDoA localization systems in complicated environments.
  • To overcome the limitations of simulation-only and experiment-based evaluation methods.
  • To provide a versatile tool for assessing TDoA system performance under various conditions.

Main Methods:

  • Utilizing radio propagation graphs to simulate channel impulse responses (CIRs) between a source and TDoA sensors.
  • Emulating realistic received signals in baseband by combining transmitted signals and simulated CIRs.
  • Employing a hardware unit to send emulated signals to the system under test, mimicking real-world measurements.
  • Conducting statistical analysis based on localization errors derived from comparing system estimates with ground truth.

Main Results:

  • The proposed approach successfully evaluates TDoA systems in both Line-of-Sight (LoS) and non-LoS scenarios.
  • Performance was verified across variable signal bandwidths and signal-to-noise ratios.
  • The usability of the method was demonstrated in an automobile circuit with different sensor configurations.

Conclusions:

  • The integrated, experiment-free approach is effective for evaluating TDoA localization systems in complex environments.
  • This method offers a cost-efficient and efficient alternative to traditional performance evaluation techniques.
  • The validated approach provides reliable insights into TDoA system performance under diverse conditions.