摘要
合成孔径雷达(SAR)通过方位向的合成阵列实现方位高分辨,其中合成阵列是由单次快拍内的并行空间采样与多次快拍内的串行空间采样而构成。多输入多输出合成孔径雷达(MIMO-SAR)利用波形分集特性,可在单次快拍内获得大于实际阵元数目的并行空间采样,为阵列模式配置及功能复合提供了便利。针对MIMO-SAR线性合成阵列模式问题,以单次快拍等效阵列为基础,设计了3种脉冲重复频率条件下的阵列模式。进而对比分析了不同阵列模式下最大不模糊距离、测绘带宽度和杂波抑制性能,这为不同应用的MIMO-SAR阵列合成及功能设计提供了依据。
Since synthetic aperture radar（SAR） realise the high azimuth resolution through synthesizing virtual array in azimuth, which is formed by spatial parallel sampling in a snapshot and spatial serial sampling in several snapshots. Multi-input multi-output（MIMO） radar SAR provides great convenience for the configuration of antenna array and complex function of increasing the number of spatial parallel samples, which is achieved by using space diversity and waveform diversity technology. The uniform linear array（ULA） model of MIMO-SAR is studied, and according to the equivalent array in one snapshot, three kinds of pulse repetition frequency（PRF） in MIMO-SAR mode are revealed. Then the performance of maximum unambiguous range, wide swath and clutter suppression in different array modes are analyzed, in order to supply the basis for the ways of array synthetic and function design in different applications.
出处
《雷达科学与技术》
北大核心
2016年第1期69-75,共7页
Radar Science and Technology
基金
国家自然科学基金(No.61201451
61179015)
国家863项目(No.2013AA120902)
关键词
合成孔径雷达
多输入多输出雷达
线性阵列
快拍
synthetic aperture radar（SAR）
multi-input multi-output radar
linear array
snapshot
