Echo band consisting of convective clouds has different echo structure in different evolution stages. Water surface and mountains have an effect on it's evolution.
对流云回波带在初生、成熟和消散三个不同的演变阶段结构特征不同，下垫面对回波带的演变有一定的影响。
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。
This paper analyzes the characteristics of the common Narrow Band Interference (NBI). A new approach for NBI suppression is proposed, which uses eigen-subspace based filtering on the echo data of SAR.
该文分析了常见的窄带干扰（NBI）的特性，并提出了一种基于回波数据特征子空间滤波的干扰抑制方法。
SAR echo base-band signal produce module is the key unit of the SAR echo signal simulator, its design affects the performance of the SAR echo signal simulator.
SAR目标回波基带信号产生模块是SAR目标回波模拟器的关键单元之一，其设计影响到模拟器系统的性能。
The result is accord with geological sample and sediment chart, so this method can be applied on sediment classification of narrow-band pulse echo sound signal.
分析结果与地质采样结果及海图均吻合，说明本文提出的方法应用于窄带脉冲信号的海底底质分类是适用的。
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。
X band bistatic Doppler weather radar is a new kind of weather detection radar system. It can detect three dimensional wind vector fields from the echo of rain.
波段双基站多普勒天气雷达系统是一种新型气象探测雷达系统，主要用于测量降雨回波的三维风场。
The phase matching transform is performed on the sample series. of narrow-band radar echo, and the centroid position parameter is estimated by searching for the maximum value of the matching function.
然后对窄带雷达回波采样序列进行相位匹配变换，搜索匹配函数的最大值，从而得到质心位置参数的估计值。
Aiming at data acquisition of radar echo signal with low SNR, IF band-pass sampling concept is proposed. High-speed acquisition card PCI_9820 is used to sample in real-time and store data.
针对低信噪比的雷达回波信号数据采集，文中给出了中频带通采样方案，并选用PC I_9820高速采集卡实时采集和存储数据。
Aiming at data acquisition of radar echo signal with low SNR, IF band-pass sampling concept is proposed. High-speed acquisition card PCI_9820 is used to sample in real-time and store data.
针对低信噪比的雷达回波信号数据采集，文中给出了中频带通采样方案，并选用PC I_9820高速采集卡实时采集和存储数据。
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