CAJ | 학술논문

针对宽带高分辨雷达体制下的未知速度运动目标检测问题,基于高分辨一维距离像提出一种新的非相干积累算法.首先利用改进的双向维特比算法估计目标速度及强散射点位置,提高了低信噪比下的估计精度,然后在强散射点周围选取待检测单元进行非相干积累,进一步提升了检测性能.两类飞机实测数据的多个实验结果表明,当目标发生距离走动的情况下,该算法性能相对传统的非相干积累算法有明显的提高.
침대관대고분변뢰체체제하적미지속도운동목표검측문제,기우고분변일유거리상제출일충신적비상간적루산법.수선이용개진적쌍향유특비산법고계목표속도급강산사점위치,제고료저신조비하적고계정도,연후재강산사점주위선취대검측단원진행비상간적루,진일보제승료검측성능.량류비궤실측수거적다개실험결과표명,당목표발생거리주동적정황하,해산법성능상대전통적비상간적루산법유명현적제고.
A new algorithm for detecting the maneuvering target with an unknown velocity based on high resolution range profiles (HRRP) of the wideband high resolution radar is proposed.In order to improve the estimation precision in the low signal-to-noise ratio (SNR),the proposed algorithm estimates the velocity of the target and the location of the strongest scattering cells relevant to the target's scattering geometry by the improved two-way viterb algorithm,and then together with the non-coherentintegration of the primary range cells chosen around the location of the strongest scattering cells,it improves the detection performance.Experimental results through measured data of two planes illustrate、that the proposed algorithm leads to a visible performance improvement compared with conventional non-coherent integration in the presence of range walking.