Title :
Time-frequency distribution series
Author :
Qian, Shie ; Chen, Dapang
Author_Institution :
DSP Group, Nat. Instrum., Austin, TX, USA
Abstract :
Using the orthogonal-like Gabor (1946) expansion, we decompose the Wigner-Ville (1932, 1948) distribution as a linear combination of localized and oscillated 2D Gaussian functions. Based on the degree of oscillation, we further group those 2D Gaussian functions into time-frequency functions Pd(t,ω) and thereby obtain the so-called time-frequency distribution series (TFDS). The TFDSD consists of up to Dth order Pd(t,ω). Since the influence of Pd(t,ω) on those useful properties is inversely proportional to d, by adjusting the order D of the TFDS one could easily balance the cross-term interference and the useful properties
Keywords :
Gaussian processes; Wigner distribution; spectral analysis; time-frequency analysis; Wigner-Ville distribution; cross-term interference; localized 2D Gaussian functions; orthogonal-like Gabor expansion; oscillated 2D Gaussian functions; power spectrum; signal analysis; time-frequency distribution series; time-frequency functions; Autocorrelation; Bridges; Digital signal processing; Fourier transforms; Frequency shift keying; Instruments; Interference; Phase shift keying; Signal analysis; Time frequency analysis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-1775-0
DOI :
10.1109/ICASSP.1994.390098
