混沌研究方法在雷達(dá)海雜波分析中的應(yīng)用
THE APPLICATION OF CHAOS THEORY TO RADAR CLUTTER
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摘要: 本文討論了混沌信號(hào)的基本特性,相空間重構(gòu),Lyapunov指數(shù),關(guān)聯(lián)維、功率譜指數(shù)等用于表征未知?jiǎng)討B(tài)系的混沌中的重要概念,并將它們應(yīng)用于來自海洋表面雷達(dá)后向散射海雜波信號(hào)的分析中。通過對(duì)海雜波的分析,計(jì)算得出:海雜波有有限的關(guān)聯(lián)維和正的Lyapunov指數(shù),功率譜指數(shù)呈指數(shù)下降。這說明海雜波具有混沌特性。
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關(guān)鍵詞:
- 混沌; Lyapunov指數(shù); 關(guān)聯(lián)維; 相空間
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. -
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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