Abstract

The effect of anomalous (with respect to noise power spectral density) TDI channels on the probability of detection of small objects by FPAs is considered. A series of FPA output images simulating the signals of TDI channels with four main types of noise PSDs is generated, the probability of detection of a small object is calculated, and the efficiency of various combinations of linear filters used in intraframe processing is evaluated. It is found that TDI channels with low-frequency noise most significantly affect the probability of detection of a small object, and the successive application of an adaptive recursive filter and a window filter that is quasi-matched with the signal leads to an increase in the probability by 22% even in the presence of 6% anomalous TDI channels in the FPA.

中文翻译：

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具有异常噪声的 TDI 通道对 FPA 检测小尺寸物体概率的影响

摘要

考虑了异常（相对于噪声功率谱密度）TDI 通道对 FPA 检测小物体概率的影响。生成一系列模拟具有四种主要类型噪声 PSD 的 TDI 通道信号的 FPA 输出图像，计算检测到小物体的概率，并评估帧内处理中使用的线性滤波器的各种组合的效率。研究发现，具有低频噪声的TDI通道对小目标的检测概率影响最为显着，并且连续应用自适应递归滤波器和与信号准匹配的窗口滤波器导致了小目标检测概率的增加。即使 FPA 中存在 6% 的异常 TDI 通道，概率也会提高 22%。