ELIMINATION OF CROSS TERMS OF THE DISCRETE WIGNER DISTRIBUTION USING MULTIWAVELETS

Wigner-Ville distribution has good time-frequency characteristics. Its cross terms are oscillatory at high frequency. To suppress the cross terms, multiwavelets analysis is adopted to decompose and reconstruct signals' Wigner-Ville distribution. Compared with the other time-frequency representation methods, simulation results demonstrate that multiwavelets analysis is very effective to eliminate the cross terms while keep good resolution.