Dr. Ming Li Profile

Dr. Ming Li

at Beihang Univ

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Proceedings Article | 23 August 2013 Paper

Signature analysis of ballistic missile warhead with micro-nutation in terahertz band

Ming Li, Yue-song Jiang

Proceedings Volume 8909, 890902 (2013) https://doi.org/10.1117/12.2031687

KEYWORDS: Missiles, Radar, X band, Target recognition, Time-frequency analysis, Motion models, Analytical research, Target detection, Terahertz radiation, Mathematical modeling

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In recent years, the micro-Doppler effect has been proposed as a new technique for signature analysis and extraction of radar targets. The ballistic missile is known as a typical radar target and has been paid many attentions for the complexities of its motions in current researches. The trajectory of a ballistic missile can be generally divided into three stages: boost phase, midcourse phase and terminal phase. The midcourse phase is the most important phase for radar target recognition and interception. In this stage, the warhead forms a typical micro-motion called micro-nutation which consists of three basic micro-motions: spinning, coning and wiggle. This paper addresses the issue of signature analysis of ballistic missile warhead in terahertz band via discussing the micro-Doppler effect. We establish a simplified model (cone-shaped) for the missile warhead followed by the micro-motion models including of spinning, coning and wiggle. Based on the basic formulas of these typical micro-motions, we first derive the theoretical formula of micro-nutation which is the main micro-motion of the missile warhead. Then, we calculate the micro-Doppler frequency in both X band and terahertz band via these micro-Doppler formulas. The simulations are given to show the superiority of our proposed method for the recognition and detection of radar micro targets in terahertz band.

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