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基于FFT旋转不变性的正弦信号频率估计新方法

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摘要 通过综合研究了FFT算法高精度频率估计的特点,本文提出利用谐波信号两次相邻序列FFT系数旋转的不变性—包含在FFT谐波系数中信号的频率因子对信号频率作相当精确的估计。计算机仿真证明了这种方法的有效性。
出处 《计量技术》 2006年第9期3-4,14,共3页 Measurement Technique
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