A Novel Clutter Spectrum Compensation Method for End-fire Array Airborne Radar Based on Space-time Interpolation
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摘要: 端射阵天线因其低风阻和高增益特性而特别适用于机载雷达的前后向补盲，而天线的前后视放置则不可避免地要面临杂波的距离非平稳问题。该文基于端射阵机载雷达杂波谱特性，针对传统空时内插法(STINT)不能直接适用于距离模糊情况下端射阵杂波补偿这一情况，提出一种基于空时内插的端射阵杂波补偿新方法。该方法充分考虑了各距离门的模糊杂波，以远程平稳杂波脊主瓣区所对应的圆弧为插值参考子空间并细化了动目标约束的约束对象，实现了对距离模糊情况下端射阵非平稳杂波的有效补偿。计算机仿真结果验证了该文方法的有效性。Abstract: End-fire array antenna is extremely suitable for forward-looking or backward-looking blind compensation of airborne radar due to its low wind resistance and high-gain characteristics, while the forward-looking or backward-looking placement of antenna can not avoid the problem of range-dependent clutter. In this paper, in view of the fact that the conventional Space-Time INterpolation Technique(STINT) can not be directly applied to end-fire array clutter compensation in range ambiguity situation, a novel method of end-fire array clutter compensation based on space-time interpolation is proposed based on the characteristics of clutter spectrum for end-fire array airborne radar. The method takes full account of the ambiguous clutter of each range gate and takes the arc corresponding to the main lobe of the long-range stationary clutter ridge as the interpolation reference subspace. Furthermore, it also refines the constrained object of moving target constraints, which achieves effective compensation for the non-stationary clutter of end-fire array in range ambiguity situation. Computer simulation results verify the effectiveness of the proposed method.
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表 1 仿真参数设置
仿真参数 ${\theta _0}({\rm{^\circ }})$ ${\varphi _0}({\rm{^\circ }})$ M N K ${d_{\rm{x}}}\left( {\rm{m}} \right)$ ${d_{\rm{y}}}\left( {\rm{m}} \right)$ $\lambda \left( {\rm{m}} \right)$ $V\;({\rm{m/s)}}$ ${f_{\rm{r}}}\left( {{\rm{Hz}}} \right)$ $H\left( {{\rm{km}}} \right)$ ${R_{\max }}\left( {\rm{km}} \right)$ 数值 90 0 16 8 8 0.115 0.058 0.23 140 2435 8 368 
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