spiral rain-band echo 螺旋雨带回波
radar bright band echo 雷达回波亮带
Narrow-Band Echo 弱窄带回波
narrow band echo 窄带回波
Echo Band 回声乐团
spiral echo band 螺旋回波带
Broad band target echo signal 目标宽带信号
The front of inclining downdraft is unfavorable to the narrow-band echo.
而倾斜的下沉气流前侧不利于窄带回波的形成。
Includes fade-in, fade-out, volume normalize, band pass, chorus, flanger, echo and speed.
包括淡入，淡出，音量正常化，带通，合唱，镶边，回声和速度。
The target echo of passive radar based on FM signal has the characteristics of low SCR and narrow band. Only the receiver with large dynamic range can receive the weak echo signal.
基于FM信号的无源雷达目标回波信号信杂比低，频带窄，只有开发大动态范围的接收机才有可能接收到微弱的目标散射信号。
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