Adaptive Algorithm for Chirp-Rate Estimation

Igor Djurovic (1) , Cornel Ioana (2) , Ljubisa Stankovic (1) , Pu Wang (3)

1 UCG - University of Montenegro
2 GIPSA-SIGMAPHY - GIPSA - Signal Images Physique
3 Department of Electrical and Computer Engineering

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.

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Igor Djurovic, Cornel Ioana, Ljubisa Stankovic, Pu Wang. Adaptive Algorithm for Chirp-Rate Estimation. EURASIP Journal on Advances in Signal Processing, 2009, 2009, pp.Article ID 727034. ⟨10.1155/2009/727034⟩. ⟨hal-00537321⟩