  A novel matrix pencil-based interference mitigation approach for FMCW radars
is proposed in this paper. The interference-contaminated segment of the beat
signal is firstly cut out and then the signal samples in the cut-out region are
reconstructed by modeling the beat signal as a sum of complex exponentials and
using the matrix pencil method to estimate their parameters. The efficiency of
the proposed approach for the interference with different parameters (i.e.
interference duration, signal-to-noise ratio (SNR), and different target
scenarios) is investigated by means of numerical simulations. The proposed
interference mitigation approach is intensively verified on experimental data.
Comparisons of the proposed approach with the zeroing and other beat-frequency
interpolation techniques are presented. The results indicate the broad
applicability and superiority of the proposed approach, especially in low SNR
and long interference duration situations.
