CAJ | 학술논문

传统合成孔径雷达采用大带宽信号实现距离向分辨，采用一维合成孔径实现方位分辨，得到二维图像。在某些近场成像场合，成像分辨率要求很高，依靠信号带宽很难达到要求。提出了一种二维合成孔径成像系统，利用二维合成孔径实现二维分辨，分辨率取决于合成孔径长度，不受信号带宽的约束，可以实现超高分辨率。信号采用简单的单频信号，可使系统大大简化。详细推导了单频信号的二维合成孔径成像算法。仿真结果表明，单频信号二维合成孔径是一种有效的高分辨率成像技术。
전통합성공경뢰체채용대대관신호실현거리향분변，채용일유합성공경실현방위분변，득도이유도상。재모사근장성상장합，성상분변솔요구흔고，의고신호대관흔난체도요구。제출료일충이유합성공경성상계통，이용이유합성공경실현이유분변，분변솔취결우합성공경장도，불수신호대관적약속，가이실현초고분변솔。신호채용간단적단빈신호，가사계통대대간화。상세추도료단빈신호적이유합성공경성상산법。방진결과표명，단빈신호이유합성공경시일충유효적고분변솔성상기술。
Traditional synthetic aperture radar uses wideband signal to achieve range resolution,and uses one-dimensional synthetic aperture to achieve azimuth resolution,thereby forming a two-dimensional image.In the cases of short range imaging,a very high imaging resolution may be required,and it is difficult to achieve such high resolution using signal bandwidth.A two-dimensional synthetic aperture imaging system is proposed;it uses the two-dimensional synthetic aperture to achieve two-dimensional resolution.The resolution depends on the length of the synthetic aperture,and it is no longer limited by the signal bandwidth and can obtain ultra-high resolution.The transmitted signal is single frequency waveform,thus the system can be very simple.The imaging algorithm for the single frequency two-dimensional synthetic aperture imaging system was derived in detail.Simulation results showed that the single frequency two-dimensional synthetic aperture imaging system is an effective technique for high resolution imaging.