高频雷达海洋回波混沌特性研究

为分析大面积海域海洋回波的混沌特性,使用时间序列相空间重构、时间延迟、嵌入维数、关联维数和Lyapunov指数等混沌特性研究方法。利用海洋状态测量与分析雷达(OSMAR 2000型)获取的时间序列数据,基于Donald E.Barrick提出的线性调频中断连续波(FMICW)雷达信号处理方法和一、二阶海洋表面回波理论,对位于浙江舟山东海岸张角约65°,距离约200 km的扇形海面高海态和低海态回波数据进行了分析处理,证明此类海洋回波具有混沌特征。

Research on chaotic characteristics of HF radar sea clutter

To analyse the chaotic characteristics of the big area ocean surface echo,the methods for researching chaotic characteristics of the time-series phase space reconstruction,time-delay,embedding dimension,correlation dimension and Lyapunov exponents are used.Utilizing the time series data obtained from the Wuhan university's ocean state measure and analysis radar,the high and low ocean state echo data of the sector ocean suface obout the angle of 65 degrees and the distance of 200 km located in East China Sea of Zhoushan of Zhejiang Province are analyzed and processed besed on D.E.Barrick's radar signals process method of linear frequency modulated interrupted continuous wave(FMICW) and the theory of first-order/second-order ocean surface echo.The obtained results prove that this sea echo has the chaotic characteristics.