一种基于数字正交变换的频率估计算法

A Frequency Estimation Algorithm Based on Digital Orthogonal Transformation

在数字信号处理中,频率估计有着极为重要的意义,频率估计在军事、通信等领域都有广泛的应用。讨论了基于功率谱的频率估计算法——Welch算法,提出了一种基于数字正交变换的频率估计算法,该算法简单,易于实现。仿真结果表明,在一定的信噪比下,基于数字正交变换的频率估计算法优于Welch算法。

In digital signal processing,frequency estimation is very important.Frequency estimation is widely used in military,communication and other fields.This paper discusses the frequency estimation algorithm based on power spectrum—Welch algorithm,and proposes a frequency estimation algorithm based on digital orthogonal transformation.This algorithm is simple and easy to implement.Simulation results show that,under certain signal to noise ratio(SNR),the frequency estimation algorithm based on digital orthogonal transformation is superior to Welch algorithm.