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Performance Analysis of Ground Target Detection Utilizing Beidou Satellite Reflected Signals.

Chaoqun Gao1, DongKai Yang2, XueBao Hong3

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Sensors (Basel, Switzerland)
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Summary
This summary is machine-generated.

This study demonstrates ground target detection using BeiDou satellite signals. Phase difference analysis of reflected signals reliably detects stationary and moving targets, proving the method

Keywords:
BeiDouCNRI branch componentphase difference informationreflected signalstarget detection

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Area of Science:

  • Geophysics
  • Satellite Remote Sensing
  • Signal Processing

Background:

  • Traditional ground target detection methods face limitations in certain environments.
  • BeiDou Navigation Satellite System (BDS) signals offer a potential alternative for passive sensing.
  • Reflected satellite signals contain information about surface characteristics and objects.

Purpose of the Study:

  • To develop and validate a novel ground target detection method utilizing reflected BeiDou satellite signals.
  • To analyze the effectiveness of phase difference information from phase-lock loops (PLL) for target detection.
  • To investigate the influence of satellite geometry and target dynamics on detection performance.

Main Methods:

  • Establishing geometric relationships between BeiDou satellites, specular points, and ground targets.
  • Analyzing phase difference data derived from PLL tracking of reflected BeiDou signals.
  • Conducting field experiments in Beijing with stationary and moving targets.
  • Evaluating target detection using in-phase (I) branch data, phase difference, and carrier-to-noise ratio (CNR).

Main Results:

  • Observed phase differences in BeiDou signals correlated with target presence during experimental periods.
  • Experimental results confirmed the feasibility of detecting both stationary and moving targets.
  • Target motion direction was discernible from changes in the satellite's I branch component data.
  • Carrier-to-noise ratio (CNR) exhibited significant variations for moving targets compared to stationary ones.

Conclusions:

  • Ground target detection using BeiDou reflected signals is feasible and reliable.
  • Detection performance is influenced by satellite altitude and azimuth angles.
  • Satellite signal components (I branch, phase difference, CNR) provide valuable information for target characterization and motion analysis.