一种新的有色噪声背景下chirp信号参数估计方法  

A New Method for Chirp Signal Parameter Estimation in Colored Noise

作　　者：于晓辉[1] 石要武[1] 周欣[1] 

机构地区：[1]吉林大学通信工程学院,吉林长春130025

出　　处：《计量学报》2006年第1期64-67,80,共5页Acta Metrologica Sinica

基　　金：吉林省科技厅自然科学基金(20030519)

摘　　要：提出一种先用二次型变换将非平稳的线性调频(chirp)信号转化为平稳形式、然后再用互谱MUSIC方法做后续处理的chirp信号参数估计方法。与其它方法相比,这种方法的突出优点是复杂度低、运算量小,且能在附加较低信噪比(-5dB)的有色噪声情况下可靠工作。仿真实验证明了该方法的正确性和有效性。The non-stationary chirp signals are converted into a kind of stationary state by quadratic form transformation firstly, and then the cross-spectral MUSIC method is used in the later signal processing. Compared with general approaches, the method here has many prominent advantages such as low complexity, reduced computational cost and working in low SNR almost without any prior information about colored noise. The correctness and the validity of the new approach are verified by computer emulations.

关 键 词：计量学 线性调频信号 二次型变换 有色噪声 互谱估计 

分 类 号：TB973[一般工业技术—计量学]