Title :
Linear shift varying filtering of non-stationary chirp signals
Author :
Bikdash, Marwan ; Yu, Kai-bor
Author_Institution :
Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
The problem of specifying a linear-shift-varying (LSV) filter to recover deterministic slowly-time-varying (STV) signals in the presence of noise or signal interference is reviewed. The LSV filter is specified based on the knowledge of the signal region of support in the time-frequency plane, or equivalently its instantaneous frequency (IF) and time-varying bandwidth (TVBW), which can be easily described using the short-time Fourier transform. A modified and more general LSV filter specification procedure based on the knowledge of the signal TVBW, IF, and rate of change of the IF is proposed. The filters produced by this procedure are shown to have a superior performance.<>
Keywords :
Fourier transforms; filtering and prediction theory; interference (signal); signal processing; Fourier transform; linear shift varying filtering; nonstationary chirp signals; signal processing; time-frequency plane; time-varying bandwidth; Bandwidth; Chirp; Filtering; Fourier transforms; Interference; Large scale integration; Niobium; Nonlinear filters; Signal processing; Time frequency analysis;
Conference_Titel :
System Theory, 1988., Proceedings of the Twentieth Southeastern Symposium on
Conference_Location :
Charlotte, NC, USA
Print_ISBN :
0-8186-0847-1
DOI :
10.1109/SSST.1988.17089
