Non-stationary signal processing using time-frequency filter banks

Abstract

We prcxrit ;I. ricw approach to tlic dcsigri of Tirnc-Frequency (TF) filter bariks for riori-stationary rioisy sigrials. Thc input riiiilticornporic~rit sigrial is rcprcscritcd by tho hliriirriurri Cross-Entropy T F distributiori irriti tlic systcrri is hascc1 011 x i array of tirric-varying filtcrs. Each filter processes oric cornporicrit of tho sippi1 ar:cortlirig to its spccifiic TI: support. Tlic output of the proposed T F filtcririg algoritkirii is a set of tlic sigrial cornprierits.Siricc tlic s\iggcstctl rric:tliod is cquivalerit to tu,()-dirricrisiorial riiatchcd filtcririg, iiri algorithrn for riori-stationary sigrial cla.ssification i s also prcscritctl To tlcriionstratc the algorithm pcrforrnance, sirnulatiori results arc givcri.