对实时测频测距的精度进行了分析。
It conducts analysis on the precision of the real time frequency and distance measurement.
叶片测频前注胶工艺得当。
Glue-injection techniques are used properly before blade's measuring frequency.
瞬时测频接收机是电子战系统的重要组成部分之一。
Instantaneous frequency measurement (DIFM) receiver is one of important component part of EW system.
因此，测频原理及方法的研究正受到越来越多的关注。
Therefore, the principle of measuring frequency and methods of research have been getting more and more attention.
瞬时测频接收机是现代电子侦察系统的重要组成部分。
Instantaneous Frequency Measurement (IFM) receivers are important for modern electronic reconnaissance systems.
多普勒频率的测频精度愈高，反演口径分布的误差愈小。
The higher accuracy of measuring the Doppler frequencies, the less error of the aperture distribution.
因此提出了一种改进的过零检测算法：零点斜率测频法。
An improved method which measures frequency through the slope of zero based on the cross-zero detecting is presented.
文章介绍了等精度测频原理，实现电路及部分测试程序流程。
The principle of equivalent accuracy measuring frequency, implement circuit and part of testing programs are introduced.
这样使测频误差在理论上只含有标准频率误差，可以使测量误差降低。
By doing so, there will only be standard frequency error in theory and decrease the measuring error greatly.
同时，根据测频的量值，由软件控制DDS完成对射频脉冲的搜索、跟踪。
Meanwhile, according to the measured value, RF can be searched and tracked by DDS controlled by software.
由于现有瞬时测频技术精度的限制，无法直接对其频率跟踪精度进行检定。
For the limitation of the accuracy of IFM technology, the frequency tracking accuracy can't be examined directly.
采用递推傅氏算法测频，动态跟踪频率变化，实时调整采样率进行定点采样；
The recursive Fourier algorithm is used in frequency measuring to dynamically track the frequency change and real-timely adjust the sampling rate for fixed sampling points.
文章介绍了一种用直接数字计数测量瞬时频率的原理，并进行了测频误差分析。
This paper proposed the theory of digital counting instantaneous frequency measurement and analyzed the error of frequency measurement.
本文介绍8031单片机多路测频的一种方法及其在塔吊综合数显仪中的应用。
This paper intends to introduce a method of frequency test of various circuits of type 8031 SCP and its application in the comprehensive figure display instrument of tower cranes.
利用超高分辨率测频原理，以简单廉价的电路完成对频率信号的超高分辨率测量。
Furthermore, by using the principle of ultrahigh resolution frequency measurement, the ultrahigh resolution frequency measurement can be achieved with simple circuits.
分析了瞬时测频接收机的温度补偿，并给出了实现恒温、测量温度和误差校正的方法。
This paper analyses temperature compensations for DIFM receiver, and gives the methods to realize constant temperature, temperature measurement and error correction.
分析、比较了测频率法、测周期法、等精度测频法等几种常用测频方法的原理及误差。
The differences of principle and precision between frequency measurement method, cycle measure method, and equivalent precision frequency measurement method are compared.
根据振弦式传感器工作原理而设计的测频系统主要由手持式测频仪和PC计算机组成。
A frequency measuring system which is designed in accordance with the working principle of a vibrating-wire sensor is mainly composed with a portable frequency measuring device and a PC.
本文介绍了应用于数字瞬时测频接收机(DIFM)中的X波段宽带微波相关器的设计。
The design of an X band broadband microwave correlator used in digital instantaneous frequency measurement (DIFM) is introduced in the paper.
该滤波器通过处理输入离散采样信号获得连续信号并抑制谐波噪声，改进了过零测频方法。
The filter processes input discrete sampling signal to recover continuous signal and suppress harmonic noise, and the zero-crossing frequency measuring method is improved.
本文根据时钟数字移相原理，提出了一种新的瞬时测频方法，适用于捷变频雷达测频系统。
In the paper, a novel instantaneous frequency measure method, which is applicable for the frequency measure system of frequency hopping radar, is presented according to the digital phase-shift theory.
现代电子战条件下，信道化接收机作为测频领域一种重要的接收机已经得到了广泛的应用。
Under the circumstance of modern electronic warfare, channelized receiver has been widely used as a kind of important receiver in the field of frequency measurement.
多通道迭代的测频算法，具有测频精度高，测频信噪比门限低，具有易于硬件实现的特点。
The iterative method of frequency estimation based on multi-channels, with high estimation precision, low SNR threshold, is easy to implement with hardware.
介绍了一种利用信号自相关处理进行快速测频的方法 ，可以提高数字接收机的测频速度。
A method which makes use of autorelation signal processing to realize fast frequency measurement is given, it can improve frequency measurement speed of digital receivers.
引导式接收需要采用测频方法得到目标信号载频，由测频结果引导后续数字信号处理器降低数据率。
The frequency-guided receiver requires target signal's carrier frequency, gained by frequency measurement, to induct data rate conversion.
计算机模拟结果证实了该算法对不同阵列获取的信号的测频有效性并显示出良好的高分辨、高精度性能。
The simulation results demonstrate our algorithm to be of high-resolution and high-precision with arbitrary array geometry.
此方法回避了多维谱峰搜索和参数配对，克服了在短数据时离散傅立叶变换测频分辨率低和性能差的不足。
Without any spectral peak search and parameters pairing, the resulting method is computationally efficient with high resolution and small variance, even in the short data length.
其中涉及到信号预处理、数据采集、同步触发、测频、自动控制、数据显示和处理、频谱分析等诸多方面的理论。
DSO covers the theories of signal pretreatment, data collection, frequency detection, automatic control, analysis of frequency spectrum and data processing.
其中涉及到信号预处理、数据采集、同步触发、测频、自动控制、数据显示和处理、频谱分析等诸多方面的理论。
DSO covers the theories of signal pretreatment, data collection, frequency detection, automatic control, analysis of frequency spectrum and data processing.
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