同轨构型下LBF双基谱精度分析
doi: 10.3724/SP.J.1146.2011.00629
Precision Analysis of Loffelds Bistatic Formula (LBF) for Constant-offset Case
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摘要: 双基谱精度分析是设计成像算法的前提，该文针对同轨等速构型详细给出了LBF(Loffelds bistatic formula)的谱精度分析，当半双基角的余弦值为1和基线长与目标到航线的最近距离的比值等于半双基角的正切值这两个条件同时满足时，LBF谱是完全严格解析的。谱精度不受基线长度和斜视角大小的影响，通过仿真实验分析讨论了各种约束对于谱精度的影响。Abstract: Precision analysis of the bistatic spectrum is the precondition of designing imaging algorithms. For the constant-offset case, the precision analysis of the spectrum is given in detail in the frequency domain. The spectrum is exactly analytical when the restrictions of the bistatic angle and the baseline to range ratio are both met. Neither the baseline to range ratio nor the squint angle is a constraint explicitly. Experimental results validate the accuracy of the discussion about the restrictions of the spectrum.
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