The wavelength conversion characteristics under the small signal modulation and the converted waveform distortion under the large signal modulation are discussed respectively.
分别讨论了小信号下波长转换特性和大信号下转换波形的畸变情况。
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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