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

作　　者：杨坡 韩光威 YANG Po;HAN Guang-wei(The 8th Research Academy of CSSC,Yangzhou 225101,China)

机构地区：[1]中国船舶集团有限公司第八研究院,江苏扬州225101

出　　处：《舰船电子对抗》2022年第4期72-74,79,共4页Shipboard Electronic Countermeasure

摘　　要：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.

关 键 词：频率估计 Welch算法 功率谱 相位信息 

分 类 号：TN957.51[电子电信—信号与信息处理]