Adaptive Algorithm for Chirp-Rate Estimation. (19th August 2009)

• Record Type: Journal Article
• Authors: Djurović, Igor; Ioana, Cornel; Stanković, Ljubiša; Wang, Pu
• Other Names: Nascimento Vitor Academic Editor.
• Is Part Of: EURASIP journal on advances in signal processing. Volume 2009(2009)
• Publication Date: 2009-08-19
• Subjects: Signal processing -- Periodicals; Traitement du signal; Signal processing; Periodicals; 621.3822
• DOI: 10.1155/2009/727034
• Languages: English
• ISSNs: 1687-6172

Abstract

Abstract : Chirp-rate, as a second derivative of signal phase, is an important feature of nonstationary signals in numerous applications such as radar, sonar, and communications. In this paper, an adaptive algorithm for the chirp-rate estimation is proposed. It is based on the confidence intervals rule and the cubic-phase function. The window width is adaptively selected to achieve good tradeoff between bias and variance of the chirp-rate estimate. The proposed algorithm is verified by simulations and the results show that it outperforms the standard algorithm with fixed window width.