LI Xiu-kun, WU Yu-shuang. Cross-Term Removal of Wigner-Ville Distribution for Multi-component LFM Signals[J]. Acta Electronica Sinica, 2017, 45(2): 315-320.
A method of cross-term removal for Wigner-Ville distribution is proposed to the detection of multi-component LFM signals.For the frequency characteristics of auto terms and cross terms
it removes cross terms by filtering WVD time-frequency matrix in the transform domain.The matrix transformation formula and the expression of all terms after transformation are given.And in view of the performance of filter
an energy weighted method is put forward to improve the slow oscillating cross term.Simulation and experimental results demonstrate that
it can eliminate the cross term with no reduction of time-frequency resolution.