reference frequency
英 [ˈrefrəns ˈfriːkwənsi]
美 [ˈrefrəns ˈfriːkwənsi]
网络 参考频率; 基准频率; 參考頻率; 参考信号频率; 标称频率
双语例句
- 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。 - The goal of any frequency synthesizer is to generate a desired output frequency based on a given input reference frequency.
任何频率合成器的目标都是根据一个给定输入参考频率产生一个期望输出频率。 - The NPU takes the reference frequency from any incoming traffic interface at any speed.
网络处理器（NPU）可以从任何入局通信接口以任何速率获取参考频率。 - This is the complete set of frequency synthesis parameters that are possible given our reference frequency and desired output frequency.
这是完整的一套鉴于我们参考频率和期望输出频率的可能的频率合成参数。 - Frequency or time is derived from the traffic interfaces except in nodes where a primary reference frequency or time source is provided.
除了在一些节点中提供了主要参考频率或者时间源之外，频率或定时均可从流通接口中获得。 - It is proved that the choice of the reference frequency in NCSA is unique. A multiple-look SAR imaging method for the large squint angle is presented.
指出了非线性CS算法在实际应用中其参考频率的选择是唯一的，并提出了一种在大斜视角下进行多视处理的方法。 - The complex weighting vector at the reference frequency is evaluated using Genetic Algorithm to make the array response cater for the pattern specified.
采用遗传算法对参考频率上的复数权向量进行设计使阵列响应满足给定的方向图要求。 - The reference frequency can eliminate most of the impact CMOS imager sensor itself makes to the system MTF and therefore make the MTF values more accurate.
由于参考空间频率的引入，大体消除了CMOS图像传感器本身MTF对测量结果的影响，从而使测量结果更接近理论运算结果。 - This method brings in a new conception of reference frequency. By reading the pixel values which reference frequency and tested frequency make on the CMOS imager sensor through the optical imaging system, this method can calculate out the MTF of the optical imaging system promptly and accurately.
该方法通过引入参考空间频率，利用在CMOS图像传感器像面上，对被测空间频率与参考空间频率的像素灰度值的读取，能够便捷并且比较准确地测定镜头的MTF值。 - It's principle, structure and realization method are also given. Then the linear function relationship between output frequency and reference frequency is deduced.
给出频率合成器的结构和实现方法，推导出输出频率与基准频率之间具有线性函数的关系。 - In digital TV tuner chip, in order to reject the common-mode noise to improve its performance, all the signals are differential. So the phase-locked loop which provides local oscillate signals for the chip needs differential reference frequency source.
在数字电视调谐芯片中，为了抑制电路的共模噪声，提高芯片的性能，所有信号都采用差分信号，因而为芯片提供本振信号的锁相环需要差分的参考频率。 - The Method for a Signal Conversion Circuit with Reference Frequency
一种频标变换的方法 - In order to realize reference frequency coversion, phaselock loop and frequence transfer circuit are often used.
对基准频率进行变换通常采用锁相环路或频率搬移电路。 - Ck ( reference frequency) and?
ck（参考频率）和？ - An arbitrary wave generator is designed based on the principle of DDS. In order to improve the accuracy of the output signal, this paper uses the software program to change the frequency and reference frequency.
基于DDS原理设计了一种任意波形发生器，并通过软件编程实现对其频率字和参考频率的改变，以提高波形发生器输出信号频率的准确性。 - DDS is used to achieve fine resolution, while injection phase lock circuit is used to realize low phase noise high performance input reference frequency.
DDS用于实现小步进，而注入锁相电路则用来产生低相噪的高性能参考源。 - Opto-electronic oscillator ( OEO) is a hybrid optical electrical device featured with a loop structure and high speed performance. As a kind of oscillator, the oscillation of OEO can be injection locked by an external reference frequency.
本文所研究的光电振荡器（OEO）是一种高速光电混合环路，其振荡频率可以被锁定于外界信号的数据率。 - The design process is divided into three steps: ( 1) Evaluate the weight vector in reference frequency by numerical method.
其设计过程分为3步：（1）用数值计算的方法计算参考频率下的基阵权矢量。 - Especially, the method making signal from reference frequency of single-chip microcomputer is novelty, simple and agility.
特别是本文提出的利用单片机为频率合成器提供不同的基准频率从而得到不同音频输出信号的方法，新颖简单、灵活方便。 - The complex weighting vectors at other frequencies satisfying the request of wideband constant beamwidth can be deduced from the one at the reference frequency.
其它频率点上满足宽带恒定束宽要求的复权向量可以根据参考频率上的复数权值通过折算求得。 - As their reference frequency source, it is critical part of the above equipments, called as their heart.
作为它们的基准频率源，它是以上电子设备的关键性部件，被称为此类电子设备的心脏。 - Then, two steps to design a broadband sensor array are given: 1. The weights of discrete sensor array are got at reference frequency by using traditional narrowband design method.
接着给出了基于DFT插值的宽带波束形成器设计的两个步骤：（1）使用窄带波束形成器的设计方法计算在参考频率下基阵的加权系数； - Today, as an excellent signal source, crystal oscillators provide the reference frequency signal for communication and radar systems, becoming the core of the most critical components of communication and radar systems.
当今，晶体振荡器作为一种优秀的信号源，为通信和雷达系统提供基准频率信号，是通信、雷达系统最关键的核心器件。 - Studying the dynamic performance of PLL in the process of lock-in by simulating the linear models, which are based on the time-varying reference frequency or time-varying frequency divider.
使用时变分频器和时变参考频率两种不同线性模型仿真，深入研究了锁相环锁入过程的动态性能。 - The optical mm-wave generator is locked by two sources: the external optical injection and the driven RF reference frequency. Stable optical mm waves with low phase noise are then generated.
该光毫米波发生器通过外部光注入以及直接调制较低的射频参考频率来双重锁定FP激光器，从而直接产生稳定的、低噪声的40GHz左右的光毫米波。 - The accuracy and stability of the reference frequency in base stations affects on the measurement results of a very single target, especially on the results for a long accumulation processing.
而基准源的频率准确度与稳定性等指标直接影响各基站对同一个目标的测量结果，特别是对长时间积累的处理结果。 - At First, introduce several basic methods of frequency synthesis and make a explanation of the selection of the reference frequency sources.
文中首先对几种频率合成技术的基本方法做了简单的比较和介绍，并对参考频率源的选取作了一定讲解和分析。 - In order to lock the frequency of sum-frequency output to reference frequency, the direct absorption spectrum and saturated fluorescence spectrum produced by leading the sum-frequency output to the gas cell was studied in detail.
为了将和频光锁定到标准的参考频率上，详细研究了和频光通过气体吸收池之后不同温度下的直接吸收光谱和饱和荧光谱。 - To simplify the mathematical model of discrete domain, using it as a model to deal with continuous domains, the PFD is as a fixed gain of the module to simulate. The required loop bandwidth is less than the reference frequency of 1/ 10.
为了简化离散域上的数学模型，把它作为连续域的模型来处理，把PFD当做是一个固定增益的模块来仿真，需要环路带宽小于参考频率的1/10。 - Compared with conventional integer-N frequency synthesizers, fractional-N frequency synthesizers break the limitation of frequency resolution on loop bandwidth and can use higher input reference frequency. This has improved performance of frequency synthesizers in many aspects significantly.
相对于传统的整数分频频率综合器，小数分频频率综合器打破了频率精度对环路带宽的限制，可以使用较高的输入参考频率，这使得频率综合器许多方面的性能都得到了明显的提高。