因此，目标反射信号的检测和提取是个难点，也是无源探测定位的关键技术之一。
So, the detection and extraction of signals reflected by the target are difficulties and the key technology of passive tracking location.
尤其是对于微弱的目标反射信号，本算法与常规算法相比，有十分明显的优越性。
The algorithm has obvious advantages over traditional ones especially in extracting weak target echoes.
文章分析了调制脉冲激光雷达探测信号水下传输模型，研究了海水后向散射信号以及目标反射信号的频域特性。
The article analyses the seawater transport model of the modulated-pulse LIDAR signal, and the frequency characteristic of the seawater backscattering signal and target reflecting signal are studied.
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