1. Problem statement and proposed solution Suppression of narrow-band interference in UWB impulse radar for human being detection Imre Damen IRCTR

2. Introduction Europcom “Locating survivors of an emergency in smoke-filled rooms or buried under rubble” Motion of chest while breathing Backscatter weak and orientation dependent Noise, cutter and narrowband interferers

3. Problem statement “Suppress the narrowband interferers without requiring to much computational power, while preserving the waveform and the signal energy” Computational power Preserving waveform Preserving signal energy

4. Internal / External interference Internal interference Originates from within equipment Stationary, except for DC offset Known frequencies External interference Originates from systems like GSM, WiFi, C2000 Time variant Frequencies unknown

5. Proposed solution internal interference • Singular Value Decomposition • Signal- and clutter-free range profiles • Estimate and subtract

6. Proposed solution external interference “Estimate and Subtract”

7. Proposed solution external interference “Filter and Restore”

8. Questions