Application of bispectrum estimation for time-frequency analysis of ground surveillance Doppler radar echo signals

被引：27

作者：

Astola, Jaakko T. ^{[1
]}

Egiazarian, Karen O. ^{[1
]}

Khlopov, Grigory I. ^{[2
]}

Khomenko, Stanislav I. ^{[2
]}

Kurbatov, Igor V. ^{[3
]}

Morozov, Vladimir Ye. ^{[2
]}

Totsky, Alexander V. ^{[3
]}

机构：

[1] Tampere Univ Technol, Inst Signal Proc, FIN-33101 Tampere, Finland

[2] Natl Acad Sci Ukraine, Inst Radiophys & Elect, Dept Radar Syst, UA-61085 Kharkov, Ukraine

[3] Natl Aerosp Univ, Dept Transmitters Receivers & Signal Proc, UA-61070 Kharkov, Ukraine

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2008年 / 57卷 / 09期

关键词：

bispectrum estimate; ground surveillance Doppler radar; instantaneous frequency (IF); time-frequency (TF) distribution;

D O I：

10.1109/TIM.2008.917192

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 microwave coherent homodyne and polarimetric ground surveillance Doppler radar is employed for collecting the radar returns from moving objects. Nonstationary nonlinearly frequency-modulated and multicomponent backscattered signals are analyzed and described as a sum of Doppler frequency-shifted polynomial chirp-like components. Instantaneous frequencies corresponding to the radiation backscattered by the different parts of a moving spatially distributed object are extracted from the time-varying bimagnitude estimates of transient sample sequences separated from the total received signal by a sliding window and projected into the time-frequency (TF) domain. Experimental investigations demonstrate a clean recovery of evolutionary phase-coupled harmonics for such targets as a swinging metallic sphere or a walking human. The computed TF distributions can be used in radar automatic target recognition systems to retrieve new data for the classification and recognition of ground moving objects.

引用

页码：1949 / 1957

页数：9

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