Dual Channel S-Band Frequency Modulated Continuous Wave Through-Wall Radar Imaging

Area of Science:

• Electrical Engineering
• Radar Systems
• Signal Processing

Background:

• Traditional through-the-wall imaging (TWRI) systems often rely on Synthetic Aperture Radar (SAR) which requires multiple antennas and system movement.
• Existing frequency-modulated continuous wave (FMCW) TWRI systems face challenges with complexity and hardware requirements.

Purpose of the Study:

• To develop a simplified dual-channel S-Band FMCW system for through-the-wall imaging.
• To reduce the number of antenna elements compared to conventional SAR-based TWRI systems.
• To implement and validate a novel 3D range-angle-Doppler estimation algorithm.

Main Methods:

• Development of a dual-channel S-Band FMCW system with one transmitting and two receiving antennas.
• Utilization of a 3D shift-invariant algorithm for range-angle-Doppler estimation.
• Conducting indoor experiments with water targets and outdoor experiments with person targets.

Main Results:

• The implemented dual-channel system significantly reduces the number of required antenna elements.
• The 3D shift-invariant algorithm enables accurate 3D imaging.
• High-quality through-the-wall imaging was achieved for both water and person targets in indoor and outdoor settings.

Conclusions:

• The proposed dual-channel S-Band FMCW TWRI system offers a more practical and efficient solution.
• The system demonstrates effective performance in diverse environments and for different target types.
• This approach advances the capabilities of through-the-wall imaging technology.