自适应共形阵雷达

R. Hersey, W. Melvin, J. McClellan, E. Culpepper
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引用次数: 2

摘要

研究了时空自适应处理(STAP)在共形阵雷达中的新应用。通过数值模拟,我们描述了两种候选共形阵列设计的性能潜力:锥形,腹部安装的独木舟和中国天线罩形状的共形阵列。我们发现共形阵设计的非线性特性导致杂波角-多普勒不平稳。这种非平稳性导致协方差矩阵估计误差和随之而来的STAP性能潜力的下降。我们发现,在考虑的两种阵列设计中,这些额外损耗在4-10 dB范围内。最后,我们简要地研究了几种基于局部处理和时变权重的改进方案,实现了几个分贝的性能提升,以完全减轻检测空间区域的非平稳行为。
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Adaptive conformal array radar
This paper considers the novel application of space-time adaptive processing (STAP) to conformal array radar. Using numerical simulation, we characterize the performance potential of two candidate conformal array designs: a tapered, belly-mounted canoe and a conformal array taking the shape of a chined radome. We find the nonlinear nature of the conformal array design induces clutter angle-Doppler nonstationarity. This nonstationarity leads to covariance matrix estimation errors and a consequent degradation in STAP performance potential. We find these additional losses reside in the range of 4-10 dB for the two array designs under consideration. Finally, we briefly investigate several ameliorating solutions based on localized processing and time-varying weights, achieving performance gains on the order of several decibels to fully mitigating nonstationary behavior over regions of the detection space.
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