echo ranging [测] 回声测距 ; [测] 回波测距 ; 回波测距法回声测距 ; 回音测距
echo ranging sonar 回声测距声纳 ; 回声定位声纳 ; [声] 回声测距声呐
echo ranging apparatus 回声测距仪
explosive echo ranging 爆炸回声定位
echo-ranging equipment 回声测距设备
echo-ranging system 回声测距系统
combined echo ranging echo sounding 统一的回声测距与测深
This paper introduces an ultrasonic ranging method based on analyzing the envelope of echo .
介绍了一种基于回波包络分析的高精度超声波测距方法。
Maximum entropy spectral estimation and LMS adaptive algorithm were proposed to extract the reflection echo signal of laser ranging system.
提出了最大熵谱估计和LMS自适应算法提取激光测距系统的反射回波信号。
As an important feature, the characteristics of echo stretching affects SNR of received laser echo signal and ranging accuracy.
脉冲展宽特性是激光回波的重要特性，其影响到回波接收信噪比和测距精度。
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