Title :
Time-frequency and time-frequency-rate representations using the cross quadratic spectrum
Author :
Abeysekera, Saman S.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
Traditionally used time-frequency distributions such as the STFT and the WVD are not suitable for FM signal characterization at low SNRs. A new method is proposed using the cross quadratic spectrum (XQS) which provides accurate temporal characterization for both signal´s instantaneous frequency and the instantaneous-frequency-rate.
Keywords :
Fourier transforms; Wigner distribution; frequency modulation; signal representation; time-frequency analysis; FM signal characterization; SNR; STFT; WVD; Wigner-Ville distribution; XQS; cross quadratic spectrum; frequency modulation; instantaneous frequency signal; instantaneous-frequency-rate signal; short-time Fourier transform; temporal characterization; time-frequency distribution; time-frequency representation; time-frequency-rate representation; Estimation; Fourier transforms; Frequency modulation; Polynomials; Signal to noise ratio; Time-frequency analysis; Polynomial Fourier transform (PFT); Time-frequency distributions; Wigner-Ville distribution (WVD); short-time Fourier transform (STFT);
Conference_Titel :
TENCON Spring Conference, 2013 IEEE
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4673-6347-1
DOI :
10.1109/TENCONSpring.2013.6584495
