At low PRF, mainlobe clutter may largely be eliminated by offsetting the Doppler spectrum so the central line is at dc and passing the return through a clutter canceller and bank of Doppler filters. To keep the clutter in the canceller's rejection notches, the 'offset' must be varied with radar speed and antenna look angle.

Chapter Contents:

• Differentiating Between Targets and Clutter
• Signal Processing
• Less Sophisticated Signal Processing
• Advantages and Limitations
• Getting Around Limitations

Inspec keywords: echo suppression; radar clutter; radar antennas; Doppler radar

Other keywords: low PRF operation; canceller rejection notch; Doppler spectrum; radar speed; clutter canceller; Doppler filters; antenna look angle; mainlobe clutter

Subjects: Radar equipment, systems and applications; Electromagnetic compatibility and interference; Single antennas