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.
采用子阵合成式宽带波束形成方法，改进常规滤波器设计原理，使其可以在规定的带宽范围内获得一致的基阵指向性。
By using the aperture synthetic wideband beamforming algorithm, the theory of designing the conventional filter is improved, and a wideband constant beamwidth is reached in the appointed bandwidth.
阵列信号处理的波束形成器实质上是一种空域滤波器。
The beam former of array signal processing is a space filter.
该波束形成器首先让信号经过维纳滤波器消除非相干噪声，而后经过经典的线性约束最小方差处理，最终达到较好的语音增强效果。
This kind of beamformer can eliminate incoherent noise when signals pass Wiener filter, then achieve a better speech-enhance effect by linear constraints minimum variance beamforming.
该波束形成器首先让信号经过维纳滤波器消除非相干噪声，而后经过经典的线性约束最小方差处理，最终达到较好的语音增强效果。
This kind of beamformer can eliminate incoherent noise when signals pass Wiener filter, then achieve a better speech-enhance effect by linear constraints minimum variance beamforming.
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