CAJ | 학술논문

由于运动的复杂性，传统的成像方法已无法满足机动目标成像的要求。在分析机动目标复杂运动引起目标回波多普勒相位非线性变化的基础上，提出了一种基于自适应最优核时频分布（ AOK TFR）理论的ISAR成像方法。通过计算回波数据不同距离单元的AOK TFR，得到不同时刻目标的瞬态ISAR像，且不受交叉项的影响；通过估计距离单元的瞬时多普勒频率并依此对成像时间段进行选择。仿真数据结果验证了该方法的有效性。
유우운동적복잡성，전통적성상방법이무법만족궤동목표성상적요구。재분석궤동목표복잡운동인기목표회파다보륵상위비선성변화적기출상，제출료일충기우자괄응최우핵시빈분포（ AOK TFR）이론적ISAR성상방법。통과계산회파수거불동거리단원적AOK TFR，득도불동시각목표적순태ISAR상，차불수교차항적영향；통과고계거리단원적순시다보륵빈솔병의차대성상시간단진행선택。방진수거결과험증료해방법적유효성。
Because of target's complicated movement,conventional ISAR imaging algorithm can not meet the demands of maneuvering target imaging .On the basis of analyzing the echo ’ s non-linear Doppler shifts caused by maneuvering target movements,a new ISAR imaging method based on AOK TFR is proposed .The instantaneous target images can be obtained by calculating the AOK TFR of different range bins .Compared with the classical time frequency distribution,the AOK TRF has no cross item interference from multi-component signals.Meanwhile,the instantaneous Doppler frequencies of echoes in range bins are estimated . According to the estimated Doppler frequencies,imaging time can be selected .The simulationd results demonstrate the validity of the proposed method .