多项式相位信号的瞬时频率估计

Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis (Cat. No.98TH8380) Pub Date : 1998-10-06 DOI:10.1109/TFSA.1998.721483

F. Çakrak, P. Loughlin

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引用次数: 5

摘要

提出了一种新的多窗口时频估计方法，用于噪声存在下恒幅多项式调频信号的瞬时频率估计。该方法计算简单，对于无噪声信号渐近无偏，并且与其他估计方法(包括交叉多项式Wigner时频方法(X-PWVD))相比，对二次和三次调频信号的信噪比(SNR)阈值提高了约3 dB。

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Instantaneous frequency estimation of polynomial phase signals

We develop a new multi-window time-frequency method for estimating the instantaneous frequency (IF) of constant amplitude polynomial FM signals in the presence of noise. The method is computationally simple, asymptotically unbiased for noise-free signals, and provides a signal to noise ratio (SNR) threshold improvement of about 3 dB over other estimators, including the cross-polynomial Wigner time-frequency method (X-PWVD), for quadratic and cubic FM signals.

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Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis (Cat. No.98TH8380)

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