为获取不同极化通道的微多普勒元素,建立了双通道极化合成孔径雷达微动信号获取模型,详细推导了采用相位中心偏置天线( DPCA)技术剔除地杂波后的极化微多普勒参数化表述。在此基础上,为充分融合各极化通道信息,提出了一种基于Pauli基展开的联合极化微多普勒矢量提取方法,据此可显著增强低信噪比下的微多普勒特征。仿真数据验证了该方法的有效性。
In order to obtain the polarimetric micro-Doppler ( PolmD) elements from different channels, the signal acquisition geometry of dual-channel polarimetric synthetic aperture radar ( PolSAR) is estab-lished, and the PolmD mathematical expression with clutter suppressed by displaced phase center antenna ( DPCA) is deduced detailedly. And then for better syncretizing the whole polarimetric information, a method of joint PolmD vector extraction based on Pauli-basis expansion is presented, which can enhance the PolmD features markedly under the condition of low signal noise ratio. Simulation results verify the a-vailability of the proposed method.