Eigendecomposition-based Interference Suppression for Ultra-Wideband Impulse Radio Life Detection

Life detection using ultra-wideband impulse radar is susceptible to various kinds of interference, including dominant background clutter, radio frequency interference (RFI), disturbance caused by the radar hardware, thermal noise, etc. An interference suppression algorithm based on eigendecomposition is proposed. In the fast-time domain, the proposed algorithm has the ability to remove the interferences in the radar operating band. In the slow-time domain, the proposed algorithm can suppress the interferences in the respiratory signal frequency band, 0.17 to 2HZ. Experimental results demonstrate that the proposed algorithm further improves SNR without respiratory signal suppression.

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