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Instantaneous frequency rate estimation for high-order polynomial-phase signal

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4 Author(s)
Pu Wang ; Sch. of Electron. Eng., Univ. of Elec. Sci. & Tech of China, Chengdu ; Hongbin Li ; Djurović, I. ; Jianyu Yang

For a high-order polynomial-phase signal (PPS), instantaneous frequency rate (IFR), which is defined as the second derivative of the phase, is estimated by using an estimator with only a second-order nonlinearity. Compared to high-order phase function (HPF), the proposed IFR estimator presents improved performance including smaller mean-squared error (MSE) and lower SNR threshold. Statistical analysis via a multivariate first-order perturbation analysis is derived for the estimate bias and MSE. Numerical results verify our analytical results.

Published in:

Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on

Date of Conference:

19-24 April 2009