综合孔径微波辐射计信道误差补偿研究

在一维综合孔径微波辐射计的理想信道仿真模型基础上对接收机信道的非理想特性进行分析并建立仿真模型,该模型包含了信道间的串扰、不平衡度、乘法器前端输入失衡等多种误差因素,最后从相位误差和系统噪声对干涉相关测量产生的贡献入手,提出有效抑制误差的亮温补偿方法,进而得到更接近真实亮温分布的反演结果.

Study on Channels Error Compensation Method of Synthetic Aperture Radiometer

Based on an ideal multi-channel signal model for 1D synthetic aperture radiometer, the nonideal characteristic of channels of radiometer was analyzed, and then a related simulation model was established. This model included some error complications such as mutual-coupling, channel imbalance, the imbalance of input signals of multiplier, and so on. The error components of interferometry which caused by the phase error and the noise of radiometer were studied. A compensation method for brightness temperatures was put forward, which produced much better result and much closer to the retrieved results of true brightness temperature distribution.