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Performance Evaluation of Multi-Modal Radar Signal Processing in Dense Co-Existent Environments
Anum Pirkani1, Fatemeh Norouzian1, Ali Bekar1,2
1School of Electronic, Electrical and Systems Engineering, University of Birmingham, Birmingham B15 2TT, UK.
Sensors (Basel, Switzerland)
|May 4, 2026
Summary
This study introduces a multi-modal beamforming technique to combat radar interference, enhancing situational awareness (SA) in dense environments. The approach effectively suppresses interference, improving radar system reliability for automotive and maritime applications.
Area of Science:
- Electrical Engineering
- Signal Processing
- Sensor Fusion
Background:
- Wide-scale radar deployment for 360° situational awareness (SA) faces significant interference challenges.
- Interference, both self and mutual, degrades SA reliability, especially in dense, multi-radar environments operating in the same frequency band.
Purpose of the Study:
- To evaluate a multi-modal beamforming approach combining unfocused synthetic aperture radar (SAR) with Multiple-Input, Multiple-Output (MIMO) beamforming.
- To enhance radar resolution and suppress interference in complex operational scenarios.
Main Methods:
- A novel multi-modal beamforming technique integrating unfocused SAR and MIMO beamforming.
- Systematic analysis of signal-to-interference-plus-noise ratio (SINR) throughout the processing chain.
- Validation through extensive simulations and experimental data in automotive and maritime settings.
Main Results:
- Demonstrated significant interference suppression capabilities of the proposed multi-modal beamforming approach.
- Quantified improvements in radar resolution and overall system performance.
- Validated the effectiveness across diverse automotive and maritime environments.
Conclusions:
- The multi-modal beamforming approach offers a robust solution for mitigating radar interference.
- This technique enhances the reliability of situational awareness systems in challenging, dense radar environments.
- The findings support the practical deployment of advanced radar systems in safety-critical applications.
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