混沌研究方法在雷达海杂波分析中的应用
THE APPLICATION OF CHAOS THEORY TO RADAR CLUTTER
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摘要: 本文讨论了混沌信号的基本特性,相空间重构,Lyapunov指数,关联维、功率谱指数等用于表征未知动态系的混沌中的重要概念,并将它们应用于来自海洋表面雷达后向散射海杂波信号的分析中。通过对海杂波的分析,计算得出:海杂波有有限的关联维和正的Lyapunov指数,功率谱指数呈指数下降。这说明海杂波具有混沌特性。Abstract: The paper describes the concepts of reconstruction of phase space, correlation dimension, Lyapunov exponent and power spectrum exponent. The calculations presented is based on experimental radar data which confirm the chaotic nature of sea clutter. In particular, the results of the calculations show that the first Lyapunov exponent of sea clutter is indeed positive. Such a result is an inherent characteristic of a chaotic process.
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H.Lenng.T.Lo.Chaotic radar signal processing over the sea IEEE J.of Oceanic Engineering 1993,18(3):287-295.[2]N.He,S,Haykin,Chaotic modellinhg of sea[J].Electron,Lett.1992,28(22):2076-2078[3]P.R.Chakravarthi,Radar target detection in chaotic clutter,Proc.of the 1997 IEEE NationalRadar Conference,Syracuse,Nes York,May,13-15,1997,367-371. -
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