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Instantaneous frequency estimation using higher order L-Wigner distributions with data-driven order and window length

机译:使用具有数据驱动的阶数和窗口长度的高阶L-Wigner分布进行瞬时频率估计

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摘要

The L-Wigner distributions are defined in order to improve the concentration of signal's time-frequency representation. For a finite distribution order and nonlinear instantaneous frequency (IF) it gives biased IF estimates. In the case of noisy signals the optimal window length and distribution order depend on the noise variance and unknown IF. In this article an adaptive IF estimator with the time-varying and data-driven window length and distribution order is developed. Based on the analysis that has been done here, lower order time-frequency distributions are introduced.
机译:定义L-Wigner分布是为了提高信号时频表示的集中度。对于有限分布阶数和非线性瞬时频率(IF),它给出了有偏的IF估计。在有噪声信号的情况下,最佳窗口长度和分布顺序取决于噪声方差和未知中频。在本文中,开发了具有时变和数据驱动的窗口长度和分布顺序的自适应IF估计器。基于此处已进行的分析,介绍了较低阶的时频分布。

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