Which technique is used to suppress stationary clutter to highlight moving targets?

• A. Constant False Alarm Rate filtering
• B. Gating isolates specific angular sectors
• C. Doppler shift measurement
• D. Moving Target Indicator suppresses stationary clutter to highlight moving targets

Answer: (D)

Distinguishing moving targets from stationary clutter is achieved by using Doppler-based filtering that suppresses echoes with no motion. The technique called Moving Target Indicator applies temporal processing across successive radar pulses to cancel out stationary echoes, so clutter is reduced and moving targets stand out. Doppler shift measurement by itself can indicate motion but doesn’t remove clutter; other methods like gating or thresholding deal with area or detection levels rather than clutter suppression. The process of MTI is specifically designed to suppress stationary clutter to highlight moving targets.