... 信号频谱密度 signal spectral density 信号频移 signal frequency shift 信号品质检测器 signal quality detector ...
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本文详细的论述了依据正交相位检测法提取多普勒频移信号的方法，并对各部分实现电路作一简要的介绍。
This paper has discussed the way of probing Doppler shift signal based on crossed phase detecting method in detail and introduced each function circuits briefly.
信号的任何多普勒频移无论如何都不会移出这个频带，而且也肯定会是整个信号的一个组成部分。
Any Doppler drift in the signal would fall within this wide band anyway and will form part of the total signal.
超声血流仪实现其测量血流速度的关键是多普勒频移信号的提取，多普勒频移信号是血流速度的真实反映。
As Doppler shift signal can significantly reflect the speed of flow, the abstracting of Doppler shift signal is the key of blood flow speed testing in a ultrasonic blood flow detector.
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