Time-Frequency Characterization of Micro-Multipath Signals in Over-the-Horizon Radar

被引：0

作者：

Ioana, Cornel ^{[1
]}

Zhang, Yimin D. ^{[2
]}

Amin, Moeness G. ^{[2
]}

Ahmad, Fauzia ^{[2
]}

Frazer, Gordon ^{[3
]}

Himed, Braham ^{[4
]}

机构：

[1] Grenoble Inst Technol, GIPSA Lab, Signal Image Dept, St Martin Dheres, France

[2] Villanova Univ, Ctr Adv Commun, Villanova, PA 19085 USA

[3] Defence Sci & Technol Org, Intelligence Surveillance & Reconnaissance Div, Sydney, NSW, Australia

[4] AFRL, Dayton, OH 4543 USA

来源：

2012 IEEE RADAR CONFERENCE (RADAR) | 2012年

关键词：

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A challenging task in over-the-horizon radar (OTHR) is the tracking of target altitude. It has been shown that the micro-multipaths due to ocean/ground reflections may reveal important information about the elevation maneuvering of a target. The Doppler signature of such micro-multipath signals is typically composed of three components having close nonlinear time-frequency behaviors. In this paper, we develop novel time-frequency analysis techniques for the characterization of Doppler effect of micro-multipath signals. The proposed method is based on the local analysis of the signal phase, followed by a stationarization operator. In the warped representation domain, the multi-component nonlinear Doppler signatures become stationary, thus allowing the application of spectral analysis tools. The results presented are based on real data and illustrate the potential of the proposed methods.

引用

页数：5

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