Performance On A Combined Representation For Time-Frequency Analysis

A new time-frequency representation based on the joint use of Wigner-Ville distribution (WVD) and local polynomial periodogram (LPP) is proposed in this paper, referred to as the WLP, for multi-component linear frequency modulated signals. By properly combining the representations of WVD and LPP, the WLP achieves their merits including high signal energy concentration and low cross-term interference. Compared with some useful time-frequency methods, the WLP has better performances on auto-term concentration and cross-term suppression.