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A Novel Signal Design and Performance Analysis in NavCom Based on LEO Constellation
Jing Ji1, Yuting Liu2, Wei Chen2
1School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China.
Sensors (Basel, Switzerland)
|December 28, 2021
Summary
A new signal scheme, CE-OFDM-PM, is proposed for integrating navigation and communication (NavCom) in low Earth orbit satellites (LEOs). This scheme offers high accuracy, anti-interference, and robust performance for future satellite systems.
Area of Science:
- Satellite communication
- Signal processing
- Navigation systems
Background:
- The proliferation of low Earth orbit satellites (LEOs) presents a significant opportunity for integrated navigation and communication (NavCom) systems.
- Overcoming challenges in signal design is crucial for realizing the full potential of LEO-based NavCom.
Purpose of the Study:
- To propose and evaluate a novel signal scheme, CE-OFDM-PM, for integrated NavCom in LEO satellite mega-launches.
- To assess the suitability of the proposed scheme for S-band applications and its performance characteristics.
Main Methods:
- Development of the CE-OFDM-PM signal scheme.
- Analysis of signal properties including normalized power spectrum density (PSD), peak-to-side lobe ratio (PSR), and autocorrelation.
- Simulation-based performance evaluation for navigation and communication capabilities.
Main Results:
- CE-OFDM-PM is suitable for S-band with a wide PSD, high PSR, and multiple autocorrelation peaks.
- Achieved high navigation accuracy (up to 0.85 m code tracking accuracy) and minimal mutual interference.
- Demonstrated excellent anti-interference, anti-multipath capabilities at various distances, and superior communication performance (BER, CNR, Eb/N0).
Conclusions:
- The CE-OFDM-PM signal scheme shows strong potential for future satellite navigation and communication applications.
- It is a viable alternative for BeiDou Navigation Satellite System (BDS), Positioning, Navigation, and Timing (PNT) services, and 5G/B5G networks.
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