基于两阶段加窗插值的多音信号频率估计算法

频域插值是一种广泛应用于多音信号频率估计的方法.为了提高相邻单音分量频率间隔较小时的频率估计性能,该文提出了一种基于两阶段加窗插值的频率估计算法.该算法采用一种新的支持任意窗函数的插值器来估计频率,通过在不同的阶段选择不同的窗函数,可以在不损失信噪比的前提下减少多个单音分量之间的相互干扰.数值结果表明,该算法具有比现有...

Frequency Estimation of Multi-Tone by Two-Stage Windowed Interpolation

Frequency-domain interpolation is a widely used method for frequency estimation of multiple sinusoids. To improve the frequency estimation performance when the interval between adjacent frequencies is small, a new estimation algorithm based on two-stage windowed interpolation is proposed in this paper. In this algorithm, frequencies are estimated by a new interpolator which supports arbitrary windows. By choosing different windows in different stages, the proposed algorithm can reduce the mutual interference between multiple sinusoids without loss of signal-to-noise ratio. Numerical results show that the proposed frequency estimation algorithm has better estimation performance than the state-of-the-art algorithms, especially when the interval between adjacent frequencies is small.