Radar Micro-Doppler Signature Generation Based on Time-Domain Digital Coding Metasurface

Area of Science:

• Radar signal processing
• Metamaterials and metasurfaces
• Electromagnetics

Background:

• The micro-Doppler effect is crucial for radar target recognition, revealing target oscillatory motions beyond bulk movement.
• Generating comprehensive micro-Doppler signatures for diverse targets is experimentally challenging due to high costs and time constraints.
• Existing methods for micro-Doppler analysis are limited in scope and accessibility.

Purpose of the Study:

• To propose a cost-effective and powerful simulation platform for micro-Doppler effects.
• To overcome the limitations of traditional experimental approaches for micro-Doppler signature acquisition.
• To facilitate the creation of extensive micro-Doppler databases for radar applications.

Main Methods:

• Development of a simulation platform based on time-domain digital coding metasurface (TDCM).
• Leveraging TDCM's capability to generate and manipulate nonlinear harmonics during wave-matter interactions.
• Utilizing the platform to produce high-precision electromagnetic signals with multiple micro-Doppler frequencies.

Main Results:

• The TDCM-based platform successfully simulates rich and high-precision micro-Doppler signals.
• The simulation accurately describes the micro-motions of various objects.
• The generated signals are suitable for training artificial intelligence algorithms.

Conclusions:

• The proposed TDCM simulation platform provides a viable, low-cost solution for micro-Doppler effect studies.
• This approach significantly benefits artificial intelligence-based automatic target recognition by providing essential training data.
• The technology has potential applications in advanced radar systems, imaging, and biosensing.