Reconfigurable FMCW Resolution Improvement Using Adaptive Cancellation

• Published in: IEEE microwave and wireless technology letters (Print) Vol. 34; no. 5; pp. 572 - 575
• Main Authors: Carman, Aaron B., Li, Changzhi
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01-05-2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Adaptive systems; Bandwidth; Cancellation; Clutter; Clutter cancellation; Continuous radiation; Feedforward systems; frequency-modulated continuous-wave (FMCW) radar; Radar; Radar antennas; Radar clutter; Radar equipment; radar systems; Radio frequency; Signal resolution
• ISSN: 2771-957X; 2771-9588
• DOI: 10.1109/LMWT.2024.3375790

Frequency-modulated continuous-wave (FMCW) radar enables target ranging using microwave signals. However, stationary clutter can obscure targets and affect radar performance in complex environments. The existing clutter removal techniques rely on target motion or open-loop correction, making them unsuitable for stationary targets or for long-term operation. This work presents a novel radar system that actively removes clutter using adaptive RF feedforward cancellation. By operating in the RF domain, clutter effects are mitigated without increasing the computational load of the system. The proposed system is simulated and experimentally implemented, demonstrating effective clutter cancellation without compromising radar sensing capabilities.