摘要
雷达设备收发分置带来的通道幅相一致性误差是单航过InSAR系统必须考虑的突出问题之一。该文建立了通道间幅度和相位一致性误差模型,采用面目标统计信号模型得到幅相误差存在时相干系数的计算结果,分析了通道一致性误差对InSAR干涉相位偏差和标准差的影响。最后利用地面半实物仿真试验得到实际雷达通道一致性误差引入的干涉测高误差,半实物试验结果与理论分析一致,验证了通道一致性误差影响分析的正确性。
The channel mismatch error between separate radar instruments is one of the challenges in the single pass Interferometric SAR（InSAR） system.A channel amplitude and phase mismatch error model is introduced.The correlation coefficient with the channel mismatch error is obtained by a statistical signal model of extended scene.The influence of channel mismatch error on the InSAR phase deviation and variance is analyzed.Finally,a ground-based hardware-in-loop simulation is carried out to study the actual radar channel mismatch error impact on the InSAR performance.The simulation results are concordant with the theoretical analysis,which validate the correctness of the influence analysis of the channel mismatch error.
出处
《电子与信息学报》
EI
CSCD
北大核心
2011年第11期2709-2713,共5页
Journal of Electronics & Information Technology
关键词
干涉SAR
通道一致性误差
性能分析
半实物仿真
InSAR
Channel mismatch error
Performance analysis
Hardware-in-loop simulation
