基于信干噪比增益的自适应阵列抗干扰性能分析

针对自适应阵列现有的抗干扰性能评价指标存在权系数伸缩敏感,难以直观反映后续信号处理性能等缺点,在现有性能指标分析基础上,提出了信干噪比(SINR)增益指标,并给出了均匀线性阵列SINR增益的解析表达式. 新指标具有明确物理含义,可方便比较不同空域滤波器的抗干扰性能,并定量反映抗干扰后续的信号处理性能. 仿真实验结果验证了提出新方法的有效性. 

Anti-Jamming Performance Analysis of Adaptive Array Based on Signal-to-Interference-Noise Ratio Gain

The existing performance speculations of adaptive array have some shortcomings like sensitivity of weight scaling or the difficulty of reflecting the successive processing performance. To deal with this problem, a new speculation was proposed, i.e., signal-to-interference-noise ratio (SINR) gain, for evaluating the anti-jamming performance of adaptive array. Besides, the analytic expression of SINR gain was also derived for uniformly linear spaced array. The proposed SINR gain shows a clear physical meaning and can compare the anti-jamming performance for different anti-jamming spatial filters. Furthermore, the successive performance can be directly obtained via the proposed SINR gain. Finally, the results of numerical experiments show the effectiveness of the proposed method.