并根据宽波束超声波流量计的特点重点进行了自动增益控制放大器和跟踪带通滤波器的设计。
Based on the characteristic of the Wide-beam ultrasonic flowmeter, automatic gain control amplifier and the tracking band-pass filter are devised.
然后针对每个传感器，根据其各频率波束形成加权向量，采用约束优化方法，设计出具有要求幅度和相位响应的FIR滤波器。
Then, the BCBB is implemented by a set of FIR filters corresponding to the input channels, which provides the frequency response derived from BCBB weights for each sensor.
时域波束形成的分步设计法分为波束优化的权值设计和FIR滤波器的系数设计两个步骤。
The two-step method of beamforming in the time domain is divided between beam optimization weight design and finite impulse response (FIR) filter coefficients design.
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