The output signal frequency of integer frequency synthesizer is the integral multiple of reference signal frequency, Loop frequency resolution is the reference frequency. 整数频率合成器输出信号的频率是参考信号频率的整数倍,环路的频率分辨率为参考频率。
However, low frequency resolution often affects the accuracy of frequency identification and the work may therefore result in failure. 但它往往因频率分辨率低,而影响频率识别的准确性,导致故障诊断的失败。
The frequency resolution and the character of real-time are also discussed. 同时对其频率分辨率和实时性进行了讨论。
Improving the frequency resolution requires more data points per average. Thus, the acquisition block size increases with finer frequency resolutions. 提高频率从而获得字区大小随频率分解而增长。
Study on the Angle Estimation Based on the High Frequency Resolution Profile in the MMW Terminal Guidance Radar 毫米波末制导雷达频域高分辨测角技术研究
At last the simulation result proves appropriate parameters can increase frequency resolution higher. 最后根据仿真结果证明合适的参数设置可以有更高的频率分辨率。
Under normal circumstances, in order to filter at any frequency band have good frequency resolution, can be used with a broadband constant-pass filter, such as radio frequency-selective. 一般情况下,为使滤波器在任意频段都有良好的频率分辨力,可采用恒带宽带通滤波器,如收音机的选频。
The high frequency resolution technology is proposed in this paper, which can improve the resolving power to the small target of the terminal guidance radar in the strong ocean clutter background. 提出在强海杂波环境下利用频域高分辨技术提高末制导雷达对弱小目标的分辨能力。
In the UAV telemetry& control system, it is required that the numerical control oscillator ( NCO) having high frequency resolution and small spurious signal. 无人机的测控系统要求数控振荡器(NCO)的频率分辨率高、相位噪声低、杂散小。
Designed for the lower angle precision of the MMW terminal guidance radar in angular tracking, the new algorithm based on high frequency resolution profile is proposed in this paper. 针对毫米波末制导雷达角跟踪精度差的问题,提出基于频域高分辨像的单脉冲测角算法。
The more narrow bandwidth selected, then the higher the frequency resolution, but this time to be testing to cover the entire frequency Fan stressed the need to filter the number of very substantial. 所选带宽越窄,则频率分辨力越高,但这时为覆盖所要检测的整个频率范调,所需要的滤波器数量就很大。
The Effects of Preferences on Frequency Resolution in the Analysis of Signal Spectrums 信号谱分析中参数选择对频率分辨率的影响
This system has adopted the algorithm of digital down convert FFT, so the frequency resolution is improved greatly. 使用先进的数字信号处理器,缩减了分立元件的数量,提高了系统的稳定性和扫频的速度;
Radio spectrometer is important method and main instrument of radio astronomy research, through which we can research radio astronomy phenomenon in wide frequency spectrum and continuous time with high frequency resolution and high temporal resolution. 射电频谱仪是通过高的频率分辨率和高的时间分辨率,在广泛的频谱范围内和连续的时间演化上进行射电天文观测的仪器,它是射电天文研究的重要方法和主要工具。
Some extension and modification of the frequency resolution are presented at last. 最后,对DFT频率分辨率定义进行了扩展和修正。
Many correction methods have been proposed for signal's frequency and phase corrections when there is only a frequency signal in one frequency resolution cell, for example, three-point convolution method, amplitude ratio method and phase difference method. 在一个频率分辨单元及其附近只存在一个频率信号时,对频率和初相的校正有多种方法,如三点卷积校正法、幅度比值校正法和相位差法。
The time-varying coherence based on Morlet wavelet and Harmonic wavelet transform is mainly introduced for the time and frequency resolution in different parameters. 基于Morlet小波和Harmonic小波变换研究时变相干分析的特点和差异,对这两类小波变换进行着重介绍,讨论有关参数对频率和时间分辨率的影响。
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. 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。
In comparison with general single-loop type, this one has higher frequency resolution and lower phase noise. 而与普通的单环频率合成器相比,具有更高的频率分辨率和更低的相位噪声。
The frequency resolution is an important concept in the digital signal processing teaching, because it effects the DFT parameter choice. 频率分辨率是数字信号处理课程教学中一个重要的概念,因为它决定了DFT参数的选择。
Meanwhile, PLL technology also has the contradiction between the frequency switching speed and frequency resolution. PLL即锁相技术虽然也是比较成熟的技术,但是它有自身优点的同时也有频率转换速度慢,频率分辨率不高的缺点。
The advantage of having a fast frequency switching time, the high frequency resolution, programmable control. 具有频率转换时间快、频率分辨率高、可编程控制等优点。
In addition, a 32-bit phase accumulator raises the output signal frequency resolution. 通过采用32位相位累加器,提高了输出信号的频率分辨率。
Due to its high peak power and high time/ frequency resolution, femtosecond laser has become an important tool in physics, chemistry, and biology. 飞秒激光问世以来,得益于其高峰值功率和高时间/频率分辨能力,已成为物理、化学、生物等学科和领域的重要研究手段和实验工具。
Wavelet transform is a time window and frequency window which can change the time-frequency localization analysis method, namely, low-frequency part of the high frequency resolution and lower temporal resolution, in the high-frequency part of the high time resolution and low frequency resolution. 小波变换是时间窗和频率窗都可改变的时-频局部化分析方法,即在低频部分具有较高的频率分辨率和较低的时间分辨率,在高频部分具有较高的时间分辨率和较低的频率分辨率。
This paper also analyzes the frequency resolution by simulation, points out the weakness of the classic HHT method, and develops the HHT algorithm using the wavelet packet predecomposition and normalized correlation determination. 通过算法仿真对HHT的分辨能力进行了分析,指出了传统HHT的缺点,并用小波包预分解和归一化相关性甄别的方法对传统的HHT方法进行了改进,提高了HHT的频率分辨率。
Improve the frequency resolution to estimate the number of the subcarriers of the signals at the fine detection. 在小波细检测阶段提高频率分辨率,检测出了信号的了载波数。
The system is of simple structure, flexible control, high frequency resolution and fast frequency switching speed. 系统具有结构简单,控制灵活,频率分辨率高,频率变化速率高等优点。
Short-time Fourier transform can not take care of time resolution and frequency resolution simultaneously. 短时傅立叶变换不能同时兼顾时间分辨率和频率分辨率。