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电子学报  2014 

基于Alamouti编码的MIMO-SAR高信噪比高分辨宽测绘带成像

DOI: 10.3969/j.issn.0372-2112.2014.06.023, PP. 1186-1193

Keywords: Alamouti空时编码,MIMO-SAR,信噪比,高分辨宽测绘带成像

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Abstract:

提出了一种基于Alamouti空时编码的方位-慢时间波形编码方案.系统沿方位向分两个子孔径按Alamouti编码矩阵对正交波形作脉间编码发射,接收端全阵列分子孔径接收,通过对回波信号作方位多普勒解模糊,再解码处理Alamouti编码组内相邻两个脉冲重复间隔(PRI)的回波信号,实现了正交子波形的彻底分离,改善了回波信号的信噪比,可实现高信噪比下高分辨宽测绘带成像.系统结构简单,孔径资源利用率高,且具有同时多模式工作潜力.仿真分析验证了系统信号处理方法的正确性.

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