Can sea clutter and indoor radio propagation be modeled as strange attraetors?

J. B. Gao, S. K. Hwang, H. F. Chen, Z. Kang, K. Yao, J. M. Liu

研究成果: Conference contribution同行評審

3 引文 斯高帕斯(Scopus)


Sea clutter is the backscattered returns from a patch of the sea surface illuminated by a radar pulse. The amplitude waveforms of sea clutter and indoor radio propagation are very complicated. Can the apparent randomness of these waveforms be attributed to be generated by low-dimensional chaos? Based on the assumption that a chaotic attractor is characterized by a non-integer fractal dimension and a positive Lyapunov exponent, Haykin et al (1992) concluded that sea clutter while Tannous et al (1991) concluded that indoor radio propagation data were chaotic. However, a numerically estimated non-integral fractal dimension and a positive Lyapunov exponent may not be sufficient indication of chaos. Other researchers have also indirectly questioned the chaoticness of the sea clutter. We employ a more stringent criterion for low-dimensional chaos developed by Gao and Zheng (Phys. Rev. E, 1994) to study a two minute duration sea clutter data provided by Haykin, and indoor radio propagation data measured at UCLA, and show that these data are not chaotic. We carry out a multifractal analysis and find that sea-clutter data can be modeled as multiplicative multifractals with a lognormal envelope distribution, while the radio propagation data can be modeled as a weak multifractal in the sense of structure function technique.

主出版物標題Experimental Chaos
主出版物子標題7th Experimental Chaos Conference
編輯Visarath In, Ljupco Kocarev, Stefano Boccaletti, Bruce J. Gluckman, Jurgen Kurths, Thomas L. Carroll
發行者American Institute of Physics Inc.
出版狀態Published - 19 8月 2003
事件7th Experimental Chaos Conference - San Diego, United States
持續時間: 26 8月 200229 8月 2002


名字AIP Conference Proceedings


Conference7th Experimental Chaos Conference
國家/地區United States
城市San Diego


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