一种双站SAR同步方法及同步系统设计

摘要

收发单元之间的相位同步是双站合成孔径雷达的关键问题之一.高分辨率双站合成孔径雷达和双站干涉合成孔径雷达对收发单元的相位同步精度有很高的要求,本文结合理论模型和实验数据对相位同步问题进行了分析,提出了基于同步链方法的双站SAR同步系统方案,实现相位同步精度3°(1σ),并设计了实验系统,通过半物理仿真成像实验采集仿真成像数据,数据处理结果验证了同步方法的有效性.%This paper proposes a phase synchronization method for bistatic synthetic aperture radar(BiSAR)based on pulsed synchronization link between the transmitter and the receiver.The phase errors of BiSAR are simulated and tested in an actual BiSAR system.The factors including the oscillator phase noise,the synchronization link performance and the system instrument errors.Such as the A/D quantization noise for performance prediction and phase synchronization system design are investigated.The synchronization system is designed and implemented.And the performance of developed system is verified by an experiment with an X-Band BiSAR system in the test environment.