A more in-depth discussion of commercially available time and frequency measurement equipment and standards, and how such instrumentation can be used in the metrology laboratory.
市场上可用的时间频率测量设备和标准的更深入的讨论，以及此类仪器如何应用在计量实验室。
In this paper, it is introduced to the influence of cavitation factor, measurement taps, sampling frequency and sampling time on the test result in pressure fluctuation test of the water turbine.
介绍了水轮机压力脉动试验时空化系数、测量位置及测点、信号采样频率及采样时间等因素对试验结果的影响。
This new method reduces the influence of time response of Fourier filtering on frequency measurement and improves the accuracy of transient frequency measurement.
新的算法有效地补偿了富氏滤波的时间响应对频率测量造成的影响，提高了算法的暂态测频精度。其程序和计算非常简单。
Modulation domain analysis has become an important part for modern measurement technology. It is better than time domain and frequency domain measurement when indicating frequency variable signal.
调制域分析已经成为现代测试技术不可或缺的部分，在显现频率变化信号时优于时域测量和频域测量。
The spectrum division technique was used for establishing signal model of delay time measurement, and amplitude frequency characteristics of the signal after spectrum division was investigated.
利用频谱相除技术构建了延迟时间测量的信号模型，研究了频谱相除后信号的幅频特性。
The methods of channel measurement were overviewed and the complete schemes in time domain and frequency domain were proposed for establishing measurement system for indoor channels.
针对建立室内信道测量系统的需要，总结了信道测量的各类方法，提出了室内信道时域和频域测量的完整的系统方案。
When traditional method is used for measurement at low frequency range, measuring precision can not be guaranteed and measuring is time-consuming.
传统的频率特性测量方法，在低频时，测量精度较差，且非常费时。
It can be classified into two methods of measurements: the time domain measurement and the frequency domain measurement.
某些毫秒级以上的频率变化，只有时域测量才能实现。
The accuracy measurement of the signal can be achieved with a suitable windowing operation in time domain and an interpolation algorithm in frequency domain.
该算法通过对时域信号加合适的窗函数，并在频域采用相应的内插算法，可以有效地减小测量过程中信号的频谱泄漏，得到精确的测量结果。
Nowdays the problems commonly existing in the measurement of low frequency noise of transistors are, great errors, long time and imperfection of noise parameters.
目前有关晶体管低频噪声测量仪器普遍存在的问题是测量误差大、时间长、所给噪声参数不完善。
The phase detecting error caused by local oscillator frequency drift and non-synchronization of measurement signal and gate signal is eliminated and the measurement speed is improved at the same time.
该方法可以有效的消除因本振信号频率漂移及闸门信号与被测信号的非同步引起的测相误差，同时提高了测量速度。
Real time optimal and quasi-optimal methods for the angle measurement are analyzed using frequency-scan and phase-scan radars as examples.
本文以频率、相位扫描体制雷达为例，探讨了实现实时比幅测角最佳及准最佳方法。
The key component of the system is a digital intermediate frequency receiver employing DSP and FPGA to obtain amplitude and phase data in real-time, which improves measurement speed and flexibility.
该系统的关键部件是一个数字中频接收机，利用DSP和FPGA实时获取幅度和相位数据，从而提高了测量速度和灵活性。
Because the time frequency laboratory will be gradually improved by auto-measurement, we give the related concept and technology of virtual instrumentation.
针对时间频率实验室将逐步实现自动化测试的目标，应用了虚拟仪器的相关概念和技术。
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。
So many application system depend on the system of frequency and time measurement, such as large scale communication system, electrical power system and GPS navigation position system.
许多应用系统也都依赖于时频测量系统，如大规模通讯系统，电力系统以及GPS导航定位系统等。
This paper gives the principle diagrams of the measurement system and some methods of measuring the stability of inter pulse frequency and phase. The measurement results in time...
本文给出测试系统原理图、脉间频率和相位稳定度测量方法以及时域、频域测量结果。
The MCU is used for the center controller, achieving high accuracy frequency measurement by methods of multi-cycle synchronism and quantization time-delay.
提出了一种高精度频率测量系统的设计方法，应用单片机技术将多周期同步法和量化时延法相结合，实现了频率的高精度快速测量。
Under the condition that marked inertial navigation units(INU) measurement errors do exist, two new Doppler centroid estimation techniques in frequency domain and time domain were proposed.
本文针对载机惯导参数误差较大的实际情况，提出了改进的频域和时域多普勒质心估计算法。
It conducts analysis on the precision of the real time frequency and distance measurement.
对实时测频测距的精度进行了分析。
Two basic methods of high resolution range measurement applying LFM pulses are introduced: compression in time domain and compression in frequency domain.
介绍了线性调频脉冲信号高分辨测距的两种基本方法：时域压缩测距和频域压缩测距。
This thesis makes a study of high accuracy time interval and frequency difference measurement techniques.
本文对高精度时间差、频率差测量技术进行了研究。
The principles of common time interval and frequency difference measurement techniques are introduced, and performance of these techniques is analyzed.
对常用的时间差、频率差测量方法的原理进行了介绍，并对各种测量方法的性能进行了分析。
Basis on the out-integrating measurement, a phase error control method is proposed to measure the RSD switching current which has low frequency components and nanosecond rising time.
针对上升时间为微秒量级且含有低频分量的RSD开关电流，提出了调控相差的外积分测量方案。
The system with double 8051 chips collaboration realizes frequency measurement, improves reaction velocity of measurement system greatly and can be widely used in real time control systems.
该系统采用双8051芯片相互协作实现频率测量，使测量系统的反应速度大大提高，特别适合于在许多实时控制的系统中推广应用。
The system with double 8051 chips collaboration realizes frequency measurement, improves reaction velocity of measurement system greatly and can be widely used in real time control systems.
该系统采用双8051芯片相互协作实现频率测量，使测量系统的反应速度大大提高，特别适合于在许多实时控制的系统中推广应用。
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