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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (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.

Original languageEnglish
Title of host publicationExperimental Chaos
Subtitle of host publication7th Experimental Chaos Conference
EditorsVisarath In, Ljupco Kocarev, Stefano Boccaletti, Bruce J. Gluckman, Jurgen Kurths, Thomas L. Carroll
PublisherAmerican Institute of Physics Inc.
Number of pages8
ISBN (Electronic)0735401454
Publication statusPublished - 2003 Aug 19
Event7th Experimental Chaos Conference - San Diego, United States
Duration: 2002 Aug 262002 Aug 29

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference7th Experimental Chaos Conference
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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