摘要
讨论了基于相位梯度算法和相位差算法的多普勒调频斜率的估计方法,并与子图相关自聚焦估计算法进行了较全面的比较。给出计算机仿真的参数条件及仿真图象。
Some methods used to estimate doppler frequency rate in SAR signal,based on Phase Gradient Algorithm (PGA) and Phase Difference Algorithm (PDA),are presented in the paper. The comparison of them with subaperture correlation autofocus algorithm is also given. Finally, compared results and performance analysis are discussed by computer simulation data and images.
关键词
相位梯度算法
相位差算法
合成孔径雷达
仿真
Phase Gradient Algorithm (PGA)
Phase Difference Algorithm (PD)
SAR
Doppler frequency rate
Subaperture correlation autofocus algorithm
