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由发射机波形倾斜或接收机时间灵敏度控制所引起的LFM波形包络变化往往产生距离旁办。对旁办数值的参数分析表明,在匹配滤波器的输出端上旁办可能很高,但在旁办处理滤波器的输出端上旁办较低即使在具有4db 包络下降的情况下,仍能得到40db 旁办。这些结果和常用的成对回波理论的结果是一致。对于滤波器传递函数下降变化的要求,也有类似结果。
LFM waveform envelope changes caused by transmitter waveform tilt or receiver time sensitivity control often result in a distance bypass. The parametric analysis of the values of the by-samples shows that the output of the matched filter can be very high, but is relatively low at the output of the processing filter. Even with a 4 db envelope drop, Can get 40db next to do. These results are consistent with the commonly used theory of paired echoes. There is also a similar result for the drop in the filter transfer function.