CAJ | 학술논문

高速弹头目标成像是雷达领域的研究热点与难点。不同于常规目标，高速弹头在沿弹道运动的同时常伴随特定的自旋运动，使得雷达回波包含的多普勒信息更为复杂，对雷达高分辨成像提出了更为严峻的挑战。针对这一难题，该文从3个层面对基于自旋运动的高速弹头成像方法进行了研究。首先研究了具有轨道运动并伴随自旋运动高速弹头的雷达回波特性，揭示了回波相位信息的变化特点；其次，基于回波特性分析结果，提出了一种基于Wigner-Hough变换(WHT)的自旋弹头目标回波轨道运动补偿方法以及基于自旋运动的成像方法；最后，利用仿真数据对提出方法的有效性以及基于自旋运动成像方案的优势进行了测试，结果表明：在达到一定信噪比时该文成像算法性能稳健，较好地解决了高速弹头的速度估计难题和成像算法的复杂性问题。
고속탄두목표성상시뢰체영역적연구열점여난점。불동우상규목표，고속탄두재연탄도운동적동시상반수특정적자선운동，사득뢰체회파포함적다보륵신식경위복잡，대뢰체고분변성상제출료경위엄준적도전。침대저일난제，해문종3개층면대기우자선운동적고속탄두성상방법진행료연구。수선연구료구유궤도운동병반수자선운동고속탄두적뢰체회파특성，게시료회파상위신식적변화특점；기차，기우회파특성분석결과，제출료일충기우Wigner-Hough변환(WHT)적자선탄두목표회파궤도운동보상방법이급기우자선운동적성상방법；최후，이용방진수거대제출방법적유효성이급기우자선운동성상방안적우세진행료측시，결과표명：재체도일정신조비시해문성상산법성능은건，교호지해결료고속탄두적속도고계난제화성상산법적복잡성문제。
Currently, high-resolution imaging of a high-speed warhead is a popular topic in the field of radar technology. In contrast with regular targets, a high-speed warhead often moves along its trajectory and simultaneously exhibits a special spinning movement. The echoes from a radar sensor can contain complex Doppler information presenting a severe challenge to the high-resolution imaging procedure. This paper investigates imaging methods for a high-speed warhead considering the spinning movement. First, the radar echo characteristics of the spinning warhead are studied and the echo phase characteristics are revealed. Next, the chirp-rate estimation method using the Wigner-Hough Transform (WHT) for the trajectory movement compensation and the imaging method based on spinning are proposed. Finally, the validity and the advantage of the spin-based imaging method are tested with simulation data. Test results indicate that the imaging algorithm is robust when the data reaches a certain SNR, and this paper provides a better solution to the issue of speed estimation and the complexity of imaging algorithm of a high-speed warhead.