抗混叠滤波器

便携式数据采集系统中自适应抗混叠滤波器的设计

Design of Anti-aliasing Filter for the Portable Data Acquisition System

高品质抗混叠滤波器设计

Design of High Quality Anti-aliasing Filter

在ADC这样的数据转换系统中，采样／保持电路用于处理从前置抗混叠滤波器输出的信号。

In such data conversion system as analog to digital converter , sample / hold circuit is used to deal with the output signal from anti-aliasing pre filter .

然后介绍了所设计的磁力轴承数字控制系统的硬件框架，重点介绍了DSP最小系统、位置检测电路、抗混叠滤波器、A/D采样通道、D/A采样通道以及功率放大电路；

And the following presents further research on the hardware frame of the digital control system of AMB , especially the design of the DSP minimal system , position-acquiring circuit , filter , A / D circuit , D / A circuit , power amplifier ;

该系统具有8个A/D通道和一个D/A通道，分辨率为12bit，带有一个可编程的7阶椭圆抗混叠滤波器。

The system consists of eight A / D channels and one D / A channel with resolution of 12 bits having a programmable 7 order elliptic anti alias filter .

用于电网谐波分析的抗混叠滤波器设计

Design of the anti - alias filter for the electric network harmonics analysis

本文介绍了在采样系统中如何设计高品质抗混叠滤波器。

This article shows the reader how to design high quality anti-aliasing filters in sampling system .

而且，由于采样的频率很高，前端模拟抗混叠滤波器的过渡带衰减也不用非常陡峭。

Moreover , sampling at high frequency eliminates the need for abrupt cutoffs in the analog anti-aliasing filters .

自适应抗混叠滤波器在数据采集中的应用工期索赔中的叠加效应和发散效应分析

Design of Anti-aliasing Filter for Data Acquisition To Analyse on Piling Up Effect and Weakening Effect in Claiming for Extension of Time

在数据采集中采用带通采样，可大大降低采样率，但系统中的抗混叠滤波器会造成相位的非线性。

The application of bandpass sampling in data acquisition can reduce the sampling frequency greatly . But the anti-aliasing filter in the system would bring the phase nonlinearity .

论文中采用高速模数转换，应用过采样技术，较好的完成信号的采集以及滤波预处理，降低了抗混叠滤波器的设计难度，提高了信噪比。

Signal collection and filtering pretreatment are completed in a better way by using high-speed ADC and lead a sample technique , which also lowers design difficulty and enhances Signal-to-Noise .

首先提出了采样率转换过程中抗混叠滤波器和M带插值滤波器的时域设计算法，将滤波器的设计归结为一个约束优化问题进行解决。

An algorithm of designing the anti-aliasing filter and the Mth-band interpolation filter in time domain is firstly provided . The design of filter is translated into an optimization problem with some constraints .

设计的抗混叠滤波器，同时兼顾了信号保持与混叠抑制两方面因素，克服了传统小波滤波器设计时仅考虑信号精确重建和总体抗混叠而带来的固有缺陷。

This devised wavelet packet filters give both attention between signal preservation and aliasing reduction , it overcomes the inherent bug of traditional wavelet filters rooted from just only concerning perfect reconstruction and total anti-aliasing .

首先介绍了如何用分离元件来设计典型滤波器如贝塞尔滤波器、巴特沃斯滤波器，切比雪夫滤波器等的方法。然后讨论了采用集成电路芯片来设计抗混叠滤波器的方法。

It starts by guiding the reader through the design process for the basic filters like Butterworth , Chebyshev , and Bessel with separate components , it then goes on to introduce designing anti-aliasing filters using integrated circuits .

其需要一个低通滤波器限制3.4kHz以上的信号，防止其使通带内的信号产生失真；并加入抗混叠滤波器，防止因低通滤波器引入的频谱混叠。

This sampling process requires a low-pass filter to limit the high frequency energy above 3.4 kHz from distorting the in-band signal . An anti-aliasing filter is added to prevent the spectrum aliasing introduced by the low-pass filter .

叙述了软件无线电中常用的一种关键信号处理技术&信号的解析表示和多速率信号处理方法（抽取和内插），并简要介绍了在抽取和内插中采用的抗混叠滤波器。

In this paper , the key technology of signal processing in software radio is discussed , analytical expression and multi-velocity processing of signal-decimation and interpolation , where the anti-overlap filter often is used , is briefly introduced .

带通信号实际采样率仅为输出端所获同相分量和正交分量采样率的两倍，可以直接确定采样频率和设计低通抗混叠滤波器。

The sampling rate of the bandpass signal is exactly twice that of the in - phase and quadrature components obtained at the output . The sampling frequency determination and the lowpass anti - aliasing filter design are Straightforward .

本文在分析冲击激励试验原理和冲击力频谱的基础上，讨论了力信号的采样和频率混叠、应用抗混叠滤波器的必要性以及采样频率、冲击力持续时间和频率分辨率的选择。

Based on excitation test principle and frequency spectrum analysis of the shock force , the sampling force signal and aliasing , the necessity of using an anti-aliasing filter , the selection of sampling frequency , the duration of the shock force and frequency resolution are discussed in detail .

软件设计讨论了实时抗混叠数字滤波器的软件实现及应注意的问题，FFT实现中应注意的问题。

In the software design , we discuss the soft realize of the real time anti alias digital filter , and the problem should be taken care of , also pay attention to the problem in the realize of FFT .

在分析这些干扰源对缺陷漏磁场信号影响的基础上，精心设计了根据相对速度调整截止频率的程控高通和抗频率混叠滤波器。

Based on the analysis of these factors , programmable high-pass and anti-aliasing filters whose cut-off frequency can be automatically adjusted according to the relative velocity was well designed .

基于FPGA的新型抗混叠CIC抽取滤波器的设计

New anti-aliasing CIC filter design and realization on FPGA

另外，针对暂态谐波问题，本文还提出了一种新的检测算法&基于抗混叠db小波滤波器的小波包谐波检测算法。

In order to detect the transient harmonic , a novel algorithm ' Wavelet packet transient harmonic detection algorithm based on anti - aliasing db wavelet filters ' is provided .

谐波检测的抗混叠小波包滤波器设计

Anti - aliasing wavelet packet filters design for harmonic detection

计算机测控系统模拟通道中抗混叠/平滑滤波器的设计

Design of Antialiasing / Smoothing Filters for Analog Channel in Computer Control Systems

针对计算机测控系统模拟通道的特点，提出了一种抗混叠／平滑滤波器的设计方法，给出了典型设计。

A design method of antialiasing / smoothing filters for analog channel in computer control systems is suggested , and an example is given .

并分析了成像系统中预处理电路中电平调理以及ADC对探测器输出信号的处理，以及与ADC相关的抗混叠技术，最后得出了抗混叠滤波器在此预处理电路中是毫无意义的结论。

Then the level arranging , detector output signal processing with ADC and anti-aliasing related to ADC in pretreatment block of thermal imaging system will also be analyzed , finally the results show that the anti-aliasing filter in pretreatment block is not sense .