narrow band laser 中文意思是什麼
narrow band laser
解釋
窄帶激光器-
Narrow - band ir laser reflector
窄帶紅外激光反射器 -
The coherent excitation property of a two - level atom with a hyperfine structure in narrow band laser field
窄帶激光與能級具有超精細結構的二能級原子的相干激發 -
The thermovision 2000s long - wave, narrow band qwip 320 x 240 fpa delivers high thermal sensitivity in both warm and cold climates and makes the system resistant to existing laser
Thermovision 2000採用320 x 240像素長波窄波段的焦平面的探測器。在溫暖和寒冷的天氣下具有很高的熱靈敏度，確保系統能夠抵抗現有的激光攻擊性武器。 -
Abstract : the threshold algorithm of the target detection is often used to detect target echo signals. its performance is based on signals - noise ratio. when signals - noise ratio is great than 6. 7, the target can be detected. in order to increase the signals - noise ratio, matching filter is often used. if the system is narrow band system, the noise is color noise and matching filter cannot be used. therefore, the signals - noise ratio cannot be increased. however, the geometrical characteristic of the laser echo signal is different with the noise. this paper advises the algorithm that detects the target by the geometrical characteristic. when signals - noise ratio is great than 2, this algorithm can detect target. this algorithm has been used in practice
文摘:目標檢測的閾值法經常用於檢測目標的回波信號.它的性能取決于信噪比，當信噪比大於6 . 7時，能夠檢測出目標.為了提高信噪比，經常採用匹配濾波器.如果系統是窄帶系統，噪聲為色噪聲，無法使用匹配濾波器，不能提高信噪比.激光回波信號的幾何特徵不同於噪聲.提出了一種利用這種幾何特徵檢測目標的演算法.當信噪比大於2時，該演算法能夠檢測出目標.該演算法已經實際應用
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