sampling frequency

By peak value sampling the information of baseband signal can be obtained from an AM signal directly. By frequency conversion sampling the carrier wave's frequency of a PSK signal can be cut down.

对AM信号进行峰值采样可以直接获得基带信号的信息，对PSK信号进行变频采样可以降低其载波频率。

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Through simulation test, the sampling frequency of the board can reach 250 MSPS, while storage capacity can achieve 1 GByte.

通过仿真和测试，该数据采集卡采样率可达到250MSPS，存储容量可达1GByte。

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DI-720 series High Speed Data Acquisition Card ( HSDAC) has the advantages of connecting to PC directly, high sampling frequency, multi-channels input, manual setting and so on.

DI-720系列高速数据采集卡具有与计算机接、采样位数多、支持多路输入并可人工设置等特点。

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The bias Doppler frequency for the time delay of A/ D sampling start responds to that for target acceleration.

A/D采样起始点延时所引起的多普勒偏差对应于目标加速度所引起的多普勒频移。

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Secondly, the basic theory of OFDM system and the system model are introduced, and the errors of timing synchronization, frequency synchronization and the sampling rate synchronization are discussed in detail.

其次介绍了OFDM技术的基本原理，给出了OFDM信号的特性以及一般OFDM系统的构成模型，仔细分析了三种同步误差（定时偏差、载波频率偏差、采样时钟频偏）对OFDM解调性能的影响。

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But, to the development prospect of the PRML, the sampling frequency becomes higher, so that the request of the timing precision also becomes higher. So, the research of the high-performance timing recovery technology is urgently needed.

PRML通道不断发展的过程中，所需采样率在不断提高，而准确译码对判决定时精度的要求也随之增高，所以，研究高性能的时钟恢复技术也成为硬盘读写通道研究的迫切需要。

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The design methodology such as the choice of test signal, sampling frequency and initiative value of the gain matrix is given.

讨论辨识输入信号的设计和采样频率的选择；

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The audio interface software designed in this article supports audio Codec using I~ 2 C interface and I~ 2 S interface, supports multiple sampling frequency up to 48 khz and functions including configuration of microphone, speaker, and handset.

论文设计和开发的音频接口驱动程序支持使用I~2C接口和I~2S接口的音频编码解码器，具有支持最高48千赫的多种采样频率和配置麦克风、喇叭、耳机和耳麦的功能；

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This paper discusses difference between service measurement and traditional network measurement from sampling perspective, and deduces a theoretical lower-limit on sampling frequency.

本文从采样的角度分析了服务质量测量和传统网络测量的异同点，给出了服务质量采样频率的理论下限。

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Owing to the high-speed nature of CPLD, the sampling frequency of the constructed IC can be raised up to the range that cannot be reached by the digital controller based on microcontrollers or DSP.

由于CPLD高速运算的特性，所设计IC的取样频率可以大幅的提升，远超过各式微控器或DSP处理器。

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Systems based on OFDM are extremely sensitive to phase deviation caused by errors in synchronization. Inter-Carrier Interference ( ICI) caused by the carrier frequency deviation and sampling frequency deviation greatly deteriorate system performance.

基于OFDM技术的系统对于同步偏差所引起的相位偏移非常敏感，由载波频偏和采样频率偏差引起的子载波间干扰（Inter-carrier Interference：ICI）会严重恶化系统性能。

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With the aid of aliased frequency information from two independent sampling channels and the proposed pairing method, we can solve the frequency ambiguity.

利用两个独立欠采样通道得到的有模糊的信号频率信息，结合一定的解模糊和配对方法得到无模糊的信号频率估计。

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An adaptive sampling frequency tracking algorithm which adapt to realization of precise real time harmonic analysis is introduced.

提出了一种适于高精度实时电力谐波分析的自适应调整采样频率的电网频率跟踪算法。

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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.

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。

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Author suggests that increasing number of measurement taps and prolonging sampling time and enhancing sampling frequency will decrease signals aliasing and leakiness.

并提出在进行压力脉动试验时，应增加测点、延长采样时间、提高采样频率以避免信号遗漏和信号混叠等现象的发生。

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To achieve fine symbol timing, a loop controlled by numerical controlled oscillator ( NCO) was used to track the residual timing error and the sampling frequency error after coarse timing acquisition based on a preamble.

基于前导字进行粗同步估计，并采用数字控制振荡器（NCO）控制的环路对残留符号定时误差和采样频率偏差进行跟踪补偿，以获得精确符号同步。

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The A/ D accuracy directly restricts the entire system and the final calculation precision, so it needs extremely accurate sampling frequency. The system used DSP internal timer to control the sampling frequency.

A/D部分的精度直接制约整个系统的最终计算精度，需要极为精确的采样频率，本系统选用DSP内部的计时器来实现采样频率的控制。

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The effect of the sampling frequency on the time averaging characteristics of integrating sound level meter

采样频率对积分声级计时间平均特性影响的研究

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The paper mainly researched in sampling and storing echo signal of the millimeter-wave frequency stepping radar and signal processing. The echo signal is used for the Inverse Fast Fourier Transform to obtain the target one-dimensional distance diagram, and gain the target distance, and so on.

本文主要研究毫米波频率步进雷达目标回波信号的采集存储和信号处理，对目标回波信号采用IFFT脉冲压缩处理得到目标一维距离成像，提取目标距离等信息，并利用MFC编程实现这一过程。

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A Scheme for Simultaneous Extension and Enhancement of the HHG Plateau The relation between sampling frequency and considered harmonic power is derived.

大幅度地展宽和抬高高次谐波平台的新方案导出了交流采样频立与所考虑高次谐波之关系。

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Although increasing the sampling frequency can mitigate the undesired effects, this will impede the computational efficiency.

虽然可以增加分析讯号的取样值来改善上述的影响, 但这样会降低运算效能.

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According to the cutting speed, feed rate, sampling frequency and time, the characteristic parameters of saw-tooth chip type and shear instability could be calculated based on the saw-tooth chip forming frequency formula supported by M.C. Shaw theory.

从切削力高频信号的切削速度、进给量、采样频率和时间可以定性描述锯齿形切屑形态和剪切失稳的特征参数，依据Shaw建立的锯齿形生成频率模型。

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At last, a maximum likelihood estimating method of sampling frequency offset by transmitting two identical OFDM symbol was proposed.

通过连续重发两个相同的OFDM符号，应用最大似然估计方法确定采样频率偏差。

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The way has characteristics of wide applicative range and can satisfy different sampling frequency demands.

利用电磁力法检定纺织电子强力仪具有适用范围广,可满足不同采样频率要求的特点.

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In the simulation, constellation, Bit-Error-Rate ( BER) and Signal-to-Noise Ratio ( SNR) performance degradation are analyzed taking into account the effect of sampling frequency offset.

经过仿真，从星座图、误码率（Bit-Error-Rate，BER）及信噪比（Signal-to-Noise Ratio，SNR）损失等角度对采样频率偏差的影响做了揭示和验证。

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Also, a method of deciding the sampling frequency of sine wave is introduced.

针对FFT计算，还介绍了正弦信号采样频率的选择方法。

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With the application of auto-regressive integrated moving average algorithm, sampling frequency can trace the frequency variation of measured signal, which can realize complete alternation sampling.

运用广义预测方法，使采样频率跟踪被测信号频率的变化，实现整周期采样，保证测量精度。

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Trapping stiffness measurement with brownian motion analysis method at low sampling frequency

低频响及低采样频率下用布朗运动分析法测量光阱刚度

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Principle and Application of Quantitative Nonsynchronous Sampling Frequency Changer

量化的非同步型取样频率变换器原理与应用

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The software has the characteristics such as easy operation, complete function and friendly man-machine interface, can complete the functions expediently, such as tension set, sampling frequency set, data register, image display, etc.

本软件具有操作简便、功能齐全、人机界面友好等特点，能方便地完成张力设定、采样频率设定、数据记录、图像显示等功能。

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