分裂孔径发射阵列接收BP算法方位分辨率分析

方位向上的合成孔径可通过接收天线阵列各单元顺序接收来实现,因此研究合理有效的天线配置方式和工作模式具有重要意义.本文基于固定孔径BP成像模型,推导了单发射天线配置和分裂孔径发射配置下方位分辨率的计算公式,从理论上证明了后者比前者的方位分辨率提高了一倍,具有与传统单站SAR相近的方位分辨率.理论计算和仿真结果的一致性验证了所提出的方位分辨率估算方法的正确性,可为天线配置的选择及设计提供理论依据.

Azimuth Resolution Analysis of Back-Projection Algorithm with the Split Aperture Transmit Configuration Antenna System

Since the azimuth synthetic aperture can be realized by the elements of the receiver array receiving echo data in turn, it is significant to research the reasonable and efficient antenna configurations and operation modes.We derive the computing formulas of azimuth resolutions under single transmit antenna configuration and split aperture transmit configuration by exploiting the constant aper- ture Back-Projection (BP) imaging model in this paper.It is testified that the azimuth resolution of the latter is two times as fine as the former and achieves a similar performance with the conventional monostatic SAR.The consistency of theory analysis and simulation re- suits validates the correctness of the proposed method.The conclusions can provide theoretical warranty for the choice and design of an- tenna system.