摘要
本文提出了一种用于多线性凋频信号时频表示的方法.首先由Radon-Ambiguity变换设计出线状核函数,以去除噪声和多线性调频信号之间的交叉项在模糊域中的影响,再通过二维傅立叶变换得到一种新的时频表示.仿真实验证明了此方法可以有效的去除噪声和多信号之间交叉项的影响,在低信噪比下也十分有效.
A method for multi-LFM signals time-frequency representation is proposed. Firstly, we use the Radon-Ambiguity transform to get the linear kernel function, which can remove the cross terms of multi-LFM signals and some part of noise in the ambiguity domain.Then we use the two-dimensional Fourier transform to get the new time frequency representation. The validity of removing noise and cross terms of this method has been shown by computer simulation even in low signal to noise ratio condition.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2002年第12期1879-1881,共3页
Acta Electronica Sinica
基金
国家973重点基础研究发展规划项目(No.973-1-2-1)
