FMCW Radar System Interference Mitigation Based on Time-Domain Signal Reconstruction.

Area of Science:

• Electrical Engineering
• Radar Systems
• Signal Processing

Background:

• Frequency-modulated continuous-wave (FMCW) radar systems are susceptible to interference, which can degrade detection performance.
• Existing interference mitigation techniques may affect target signals or lack robustness.

Purpose of the Study:

• To propose and validate a novel interference detection and mitigation method for FMCW radar systems.
• To enhance the reliability and accuracy of FMCW radar in the presence of interference.

Main Methods:

• Interference detection based on analyzing differences in one-dimensional fast Fourier transform (1D-FFT) results across chirps.
• Interference signal reconstruction in the time domain using estimated parameters from 1D-FFT.
• Removal of the reconstructed interference signal without impacting the target signal.

Main Results:

• Simulations demonstrated a reduction in interference amplitude by approximately 25 dB.
• Experimental results confirmed a 20-25 dB reduction in interference amplitude.
• The proposed method effectively mitigates interference while preserving target signal integrity.

Conclusions:

• The proposed time-domain signal reconstruction method offers an effective solution for interference detection and mitigation in FMCW radar.
• The validated results confirm the practical applicability and efficiency of the developed algorithm.