CAJ | 학술논문

为提高ISAR回波模拟中的逼真度，持续地产生旋转运动目标的回波信号显得尤为重要。文中通过建立动态模板，提出一种新的ISAR目标回波模拟方法。根据动态模板中散射点分布，得到对应的散射系数矩阵和多普勒频移矩阵，然后计算出相应变化的调制系数，最后调制产生动态目标回波信号。经理论分析和仿真实验表明，动态目标回波模拟信号经ISAR处理能够形成二维图像，并且不同相干积累时间段内的成像因动态目标模板变化而呈现差异。通过合理控制旋转参量，可使模拟回波信号的成像变化更加逼真，在一定程度上能够实现对目标转向等运动状态的模拟。
위제고ISAR회파모의중적핍진도，지속지산생선전운동목표적회파신호현득우위중요。문중통과건립동태모판，제출일충신적ISAR목표회파모의방법。근거동태모판중산사점분포，득도대응적산사계수구진화다보륵빈이구진，연후계산출상응변화적조제계수，최후조제산생동태목표회파신호。경이론분석화방진실험표명，동태목표회파모의신호경ISAR처리능구형성이유도상，병차불동상간적루시간단내적성상인동태목표모판변화이정현차이。통과합리공제선전삼량，가사모의회파신호적성상변화경가핍진，재일정정도상능구실현대목표전향등운동상태적모의。
In order to improve the fidelity of ISAR echo simulation,it is very important to continually produce a rotary motion target echo signal. In this paper,through the establishment of dynamic template,a new ISAR target echo simulation method is proposed. According to the scattering point distribution of the dynamic templates,we can get the corresponding matrixes of scattering coefficient and Doppler frequency shift,and then calculate out the changing values of the modulation coefficient,finally get the dynamic target echo through modulation. The theoretical analysis and simulation results show that,the signal processed by the ISAR can form two-dimensional images,and there are changes between images of different times. By properly controlling the rotation parameters,the imaging changes of the echo simulation can be more realistic,and this can simulate a real target in some situations,such as turning direction,ect.