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引用次数: 4
摘要
提出了一种构造具有任意谱旁瓣衰减率的谱分析窗口的方法。窗口具有少量余弦幂项之和的形式，计算简单，可用于实时系统。它们被合成为具有频谱最高旁瓣的最小可能电平。合成了具有代表性的最佳窗口，其旁瓣衰减率高达100 dB /倍频程，最大旁瓣电平低至- 200 dB。给出了频谱旁瓣衰减率为9和12db /倍频的最佳窗口的参数，以及在给定的项数和衰减率下具有最低旁瓣的窗口的参数。
A Family of Optimal Windows for Harmonic Analysis with Arbitrary Falloff Rate of Spectrum Sidelobes
A method is proposed to construct windows for the spectral analysis that feature an arbitrary spectrum sidelobe falloff rate. The windows have the form of a sum of a small number of cosine-power terms, are simple to calculate, and can be used in real-time systems. They are synthesized to have the minimum possible level of the highest sidelobe of the spectrum. A representative number of optimal windows with sidelobe falloff rates up to 100 dB per octave and the maximum sidelobe level down to minus 200 dB are synthesized. Parameters of the optimal windows with spectrum sidelobe falloff rates 9 and 12 dB per octave are presented as well as of the windows that have the lowest sidelobes at given number of terms and falloff rate.
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