相对于一般的通信系统而言，低轨卫星通信系统具有信号动态范围大，多普勒频移大且变化速度快，信道起伏剧烈等特点。
LEO satellite communication system has the properties of larger power dynamic range, larger and faster changed doppler frequency shift and rapid fluctuation compared to ordinary communication system.
在OFDM系统中，影响其性能的一个重要参数就是最大多普勒频移。
The maximum Doppler frequency shift is an important parameter which affects the performance of the OFDM system.
当噪声中含有微弱的多普勒回波时，通过理论分析可知系统输出为阵发混沌状态，且可根据混沌状态的间隔周期较准确地求出回波信号的多普勒频移。
When there is faint Doppler echo in noise, the system output is intermittent chaotic, and the Doppler shift can be obtained accurately by calculating the interval of chaotic state.
实验表明，这一方案能够控制光WDM通信系统中的载波频移。
The results of experiments have shown that the design can control well the frequency drift in optical WDM systems.
系统采用移频键控（FSK）调制方式，对轴温数字信号进行处理并发射，上传给便携式模拟接车系统。
The system adopts FSK modulation way to carry out directly digital signal of axle tempratureand transmit to the receiving system of test train.
最后我们以TMS320F 2812为核心设计了UM 71轨道信号的参数检测系统，并部分实现了移频轨道信号的检测功能。
At the last, we designed a UM71 track signal parameters detecting system base on TMS320F2812, and implemented part functions of the frequency-shift track signal detecting.
详细介绍NIM4铯喷泉钟系统频移及其不确定度的最新评定方法和结果。
This paper introduces the frequency deviations of NIM4 Cesium fountain clock , the method and result of a new evaluation.
在复合系统通信中，飞行器的高动态使扩频信号存在多普勒频移。
In the communication of multiplex system, the DS signal exists Doppler frequency shift for the high dynamic situation of aerocraft.
介绍了多卜勒导航雷达的基本工作原理，推导了回波信号多卜勒频移与系统其它参量间的关系。
The basic work principle of a certain kind of Doppler radar is introduced, the relation between the echo Doppler frequency and other parameters is given.
研制的谐振式软开关弧焊逆变电源，主电路采用新型LCL结构，控制系统选用恒频移相调脉宽控制方案。
The resonant soft switching inverter arc welding power source uses LCL type structure in the main circuit, and selects phase shifting pulse wide modulation technique in the control system.
提出了一种同时测量布里渊频移和功率变化的新方案，同时对系统的布里渊频移测量精度进行了分析。
Proposed a novel scheme to measure the Brillouin frequency shift and power change, and analyzed the measurement accuracy of Brillouin frequency shift.
提出了卷积码与GMSK(高斯最小移频键控)调制器级联系统的一种迭代译码方案。
An iterative decoding scheme is proposed for the concatenation of a convolutional code and a GMSK modulator.
针对UM 71移频电容在线测试仪测量数据智能化管理的要求，设计、开发UM 71移频电容在线测试仪数据支持系统。
Aimed at the demand of intelligent data management for UM71 frequency-shift capacitance online measurer, a data support system is designed and developed.
无碰撞区跳频通信系统的跳频器所使用的跳频码是无碰撞区跳频码，该码在零位移附近一段区域内汉明相关值为零。
The No-Hit-Zone (NHZ) hopping code is employed by the frequency hopper of NHZ FH communication systems, which have no hits at all within a predefined correlation zone in the vicinity of zero shift.
本文针对微机监测系统中移频采集机功能的实现和微机监测相关技术进行了研究。
This thesis makes a research on the frequency-shift acquisition and technologies about microcomputer monitoring.
若语言扩声系统临近不稳定状态工作，频移器可以有效地减少再生混响干扰。
If the public address system is operated below but too close to the instability condition the frequency shifter can reduce effectively the interference of the regenerative reverberation.
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.
在综合考虑伪码相位误差，多普勒频移和噪声干扰的基础上，详细分析了系统的捕获性能。
The acquisition performance of the system had been analyzed in detail with phase error of PN sequences, Doppler shift and background noise taken into consideration.
分析了移频扩声系统的组成及主要特点，针对多媒体教室的扩声系统容易产生回声和啸叫等不足，提出了一种多媒体教室移频扩声系统的设计方案。
The constitution and the features of frequency shift sound reinforcement are analyzed. The application to the multimedia classroom in Chongqing Institute of Technology is presented.
该检测系统具有体积小、接口丰富、精度高等优点，为设计快速、准确的移频检测系统提供了依据。
The testing system has many advantages, such as little volume, abundant interface, and high-accuracy, which supplied the basis for designing high-speed and high-accuracy FSK testing system.
运动状态下的同步技术是通信领域克服多普勒频移的关键技术，直接影响通信系统的性能。
In movement state, the technology of synchronization is the key of overcoming Doppler frequency shift in the communication, and the performance of communication has influenced.
根据移频减振降噪原理，借助实验优化设计，分析了振动传递系统的六个刚度对抑制振动噪声传递的主次关系。
The relationship of six stiffness parameters with the restraint of vibration transfer is discussed by means of experiment optimal design.
在移动环境下，ICI的产生主要由多普勒频移引起，同时，与CDMA结合后，CD MA系统本身的多址干扰(MAI)也是影响系统性能的关键因素。
In a mobile environment, ICI is mainly caused by Doppler frequency shift. While, when combined with CDMA, Multiple Access Interference (mai) is another key factor affecting system performance.
在移动环境下，ICI的产生主要由多普勒频移引起，同时，与CDMA结合后，CD MA系统本身的多址干扰(MAI)也是影响系统性能的关键因素。
In a mobile environment, ICI is mainly caused by Doppler frequency shift. While, when combined with CDMA, Multiple Access Interference (mai) is another key factor affecting system performance.
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