中国科学院研究生院学报
中國科學院研究生院學報
중국과학원연구생원학보
JOURNAL OF THE GRADUATE SCHOOL OF THE CHINESE ACADEMY OF SCIENCES
2010年
1期
70-75
,共6页
相控阵%机载合成孔径雷达%运动补偿%DSP%FPGA
相控陣%機載閤成孔徑雷達%運動補償%DSP%FPGA
상공진%궤재합성공경뢰체%운동보상%DSP%FPGA
phased array%airborne SAR%motion compensation%DSP%FPGA
机载SAR采用相控阵天线是一个重要发展方向,而运动补偿系统对机载SAR系统至关重要.本文采用坐标映射的方法将大地坐标系下的预定波束指向映射到天线平台坐标系下,并转换为天线阵元的相位偏移,完成波束控制,实现了机载SAR的运动补偿.在基于DSP和FPGA的硬件平台上实现了该算法.初步实验结果验证了软、硬件的正确性.
機載SAR採用相控陣天線是一箇重要髮展方嚮,而運動補償繫統對機載SAR繫統至關重要.本文採用坐標映射的方法將大地坐標繫下的預定波束指嚮映射到天線平檯坐標繫下,併轉換為天線陣元的相位偏移,完成波束控製,實現瞭機載SAR的運動補償.在基于DSP和FPGA的硬件平檯上實現瞭該算法.初步實驗結果驗證瞭軟、硬件的正確性.
궤재SAR채용상공진천선시일개중요발전방향,이운동보상계통대궤재SAR계통지관중요.본문채용좌표영사적방법장대지좌표계하적예정파속지향영사도천선평태좌표계하,병전환위천선진원적상위편이,완성파속공제,실현료궤재SAR적운동보상.재기우DSP화FPGA적경건평태상실현료해산법.초보실험결과험증료연、경건적정학성.
Phased array radar is the main direction in the development of airborne SAR, and the motion compensation system is essential to the airborne SAR system. By deploying the coordinate mapping method, the target beam under the earth coordinate system is mapped into the antenna platform coordinate system and converted to the antenna array element phase shift which controls the beam. The airborne SAR motion compensation is then implemented. The algorithm is implemented by using DSP and FPCA. The experimental results show that the designed hardware and software are reliable.
