因为它们的频宽很窄，CF信号只能描绘目标的存在，而对于一些种类的蝙蝠来说，CF 信号还能描述目标相对于蝙蝠的运动。
Because of their narrow bandwidth, CF signals portray only the target's presence and, in the case of some bat species, its motion relative to the bat's.
本文还计算了不同的频宽内25周交流计数电码信号能量百分比。
The study in this paper will give support to the improvement of the 25Hz AC counting code cab signalling system.
本文还计算了不同的频宽内25周交流计数电码信号能量百分比。
The study in this paper will give support to the improvement of the 25Hz AC counting code cab signalling system.
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