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Refining Inaccurate Transmitter and Receiver Positions Using Calibration Targets for Target Localization in

Yongsheng Zhao1, Dexiu Hu2, Yongjun Zhao1

  • 1PLA Strategic Support Force Information Engineering University, Zhengzhou 86-450001, China.

Sensors (Basel, Switzerland)
|August 3, 2019
PubMed
Summary
This summary is machine-generated.

Calibration targets improve multi-static passive radar (MPR) accuracy by refining transmitter/receiver positions. This method enhances target localization, overcoming errors from inaccurate sensor locations.

Keywords:
Cramér–Rao lower boundbistatic rangecalibration targetmulti-static passive radartarget localizationtransmitter and receiver position error

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Radar Systems

Background:

  • Transmitter and receiver position errors degrade target localization accuracy in multi-static passive radar (MPR) systems.
  • Accurate sensor positioning is crucial for reliable radar performance.

Purpose of the Study:

  • To investigate the use of calibration targets to mitigate localization errors in MPR systems.
  • To develop and evaluate a novel method for enhancing target localization accuracy using calibration targets.

Main Methods:

  • Evaluation of the Cramér-Rao lower bound (CRLB) for bistatic range (BR)-based localization with calibration targets.
  • Proposal of a two-step closed-form solution: a calibration step to refine sensor positions and a localization step using refined data.

Main Results:

  • Analytical results indicate that calibration targets can significantly enhance localization accuracy.
  • The proposed method achieves CRLB performance at moderate noise levels.
  • Demonstrated superior localization accuracy compared to existing algorithms.

Conclusions:

  • Calibration targets effectively compensate for transmitter/receiver position errors in MPR systems.
  • The proposed closed-form solution provides accurate and efficient target localization.
  • This approach offers a significant advancement in passive radar technology.