摘要
针对双基合成孔径雷达二维频谱难以精确获取的问题,提出基于斜距历程泰勒级数展开的双基二维频谱微增量算法.该算法在获取斜距历程低阶泰勒展开驻相点的基础上,通过求解此驻相点与斜距历程高阶泰勒展开驻相点之间的微增量来获取高阶展开驻相点的近似解,并以此为基础得到二维频谱.数学推导表明:级数反演(MSR)算法是微增量算法的一种低阶近似.微增量算法避免了求解高阶驻相点方程,运算量小.在仿真实验中,通过对比分析微增量算法与精确传递函数(ETF)算法、MSR算法得到的驻相点和二维参考频谱的聚焦效果,验证了微增量算法的有效性.
Since it is difficult to obtain the bistatic synthetic aperture radar 2D spec- trum precisely, micro-increment algorithm is proposed based on Taylor expansion. An approximate high-order point of stationary phase is derived by solving the mi- cro-increment between the low-order and high-order point of stationary phase on the basis of the low-order point of stationary phase, and then achieve the 2D spectrum. Micro-increment algorithm avoids solving the equation of stationary phase and has a small computational cost. The link between micro-increment algorithm and method of series reversion （MSR） is given in detail. The simulation experiment shows that the algorithm has a good focusing performance and accords with the exact transfer function （ETF） algorithm and the method of series reversion, which verifies the ef- fectiveness of micro-increment algorithm.
出处
《电波科学学报》
EI
CSCD
北大核心
2013年第1期56-62,共7页
Chinese Journal of Radio Science
基金
国家部委预研基金(9140C010507100C01)
863基金(2010AAJ144)资助课题
关键词
双基合成孔径雷达
二维频谱
微增量算法
bistatic synthetic aperture radar
2D spectrum
micro-increment algo-rithm
