干涉仪宽带实时校准方法研究  

Interferometer broadband real-time phase calibration method

作　　者：韩月涛[1] 吴嗣亮[1] 潘伟萍[1] 杨帆[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《电子测量与仪器学报》2011年第8期682-687,共6页Journal of Electronic Measurement and Instrumentation

摘　　要：针对伪码连续波多基线干涉仪测角雷达系统中,天线阵接收通道相位时变延迟不一致性的问题,研究多通道相位宽带实时校准的解决方法。提出了一种通过增加干涉仪校准通道有源校准方法,设计与测量信号正交的宽带扩频信号作为校准信号,通过天线端耦合进入接收通道,利用伪码跟踪环与载波相位跟踪环对接收进来的校准信号进行实时跟踪,实时提取各个通道的相位跟踪结果对干涉仪接收通道的时变延迟误差进行校准。计算机仿真结果表明:适应接收通道固定和时变的相位延迟,在接收通道测量信号功率不大于校准信号功率10 dB情况下均获得了较好的结果。In pseudo-random code cw multi-baseline interferometer Angle radar system,one of important issues for measuring Angle is to calibrate the antenna array receiving channels phase time-varying delay inconsistency.researching the solution of multi-channel phase broadband real-time calibration in interferometer.A new calibration method by in-creasing calibration channel is proposed,and design the broadband spectrum signal as calibration signal which is or-thogonal with the measuring signal.The calibration signal couples into receiving channel through the antenna terminal,and tracking the calibration signal in real-time by PN code lock loop and phase lock loop,and receive channel time-varying delay interferometer calibration error,The simulation results indicate that the new method is feasible,and adapt the fixed and variable phase delay of receiving channels,and have higher phase calibration precision under the receiver channel measurement signal power less than a calibration signal power 10 dB conditions.

关 键 词：扩频 干涉仪测角 相位时变延迟 相位校准 锁相环 

分 类 号：TN973[电子电信—信号与信息处理]