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

3 引文 斯高帕斯(Scopus)

摘要

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.

原文English
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.
頁面154-161
頁數8
ISBN(電子)0735401454
DOIs
出版狀態Published - 2003 八月 19
事件7th Experimental Chaos Conference - San Diego, United States
持續時間: 2002 八月 262002 八月 29

出版系列

名字AIP Conference Proceedings
676
ISSN(列印)0094-243X
ISSN(電子)1551-7616

Conference

Conference7th Experimental Chaos Conference
國家/地區United States
城市San Diego
期間02-08-2602-08-29

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)

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