【摘 要】
：
对应用于聚束式合成孔径雷达 (SAR) 成像中的卷积反投影 (CBP) 算法进行了详细研究,提出了一种基于傅里叶变换的快速实现方法,使得CBP算法的计算量得到明显降低.在传统的CBP
【机 构】
：
南京航空航天大学信息科学与技术学院
论文部分内容阅读
对应用于聚束式合成孔径雷达 (SAR) 成像中的卷积反投影 (CBP) 算法进行了详细研究,提出了一种基于傅里叶变换的快速实现方法,使得CBP算法的计算量得到明显降低.在传统的CBP算法中,反投影过程中的重采样通过插值实现,因而所需的插值数量巨大,导致运算效率低下.研究了图像像素之间隐含的相对位置关系之后,本文采用一系列快速傅里叶变换 (FFT)来实现反投影过程中的重采样,避免了运算量巨大的插值过程,故提高了运算效率.仿真结果证明了新算法的可行性和有效性.相比于传统的CBP算法,新算法可以提高大约85%的运算效率.由于FFT适用于并行处理,新方法在实时处理SAR系统中有一定的应用价值.
其他文献
To investigate the seismic behavior of connections composed of steel reinforced ultra high strength concrete(SRUHSC)column and reinforced concrete(RC)beam,six i
A fuzzy model was established to estimate the state of charge (SOC) of a lithium-ion battery for electric vehicles. The robust Gustafson-Kessel (GK) clustering
以粘土状的聚苯胺-乙炔黑导电材料为空穴导体,制备了固态染料敏化太阳能电池.研究结果表明,将乙炔黑颗粒加入到聚苯胺电解质中,可明显提高该固态染料敏化太阳能电池的光电转
A new type of despreader for direct sequence spread spectrum signal is proposed. Compared with traditional despreaders, the new despreader does not contain hard
A model was established based on Maxwells equations and Navier-Stokes equations to numerically simulate the electromagnetic field and flow field in a rectangula
A series of orthogonal array experiments were conducted using carbon source, ammonia nitrogen and total phosphorus (TP) as major influencing factors to investig
Cooperative diversity is a new technology to improve bit error rate(BER)performance in wireless communications.A new power allocation algorithm to improve BER p
To study the plastic properties of reactive powder concrete continuous beams reinforced with GFRP bars,the calculation programs for moment redistribution coeffi
The preparation and properties of ceramic short fiber reinforced Al-Si alloy matrix composite and its application on the piston for internal combustion engines