• 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.

    相对一般通信系统而言,低轨卫星通信系统具有信号动态范围多普勒大且变化速度快信道起伏剧烈等特点

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  • The working processes of the frequency-tracking phase-shift PWM controlled full bridge power supply load series resonant type DBD ozone generation power system are analyzed.

    系统分析了频率跟踪移相PWM控制供电串联谐振负载DBD型臭氧发生器电源系统工作过程

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  • The maximum Doppler frequency shift is an important parameter which affects the performance of the OFDM system.

    OFDM系统中,影响性能一个重要参数就是大多普

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  • The study shows that the steady locking range is approximately twice than that of master-slave locking system and the frequency of the locked lasers may shift.

    研究表明系统稳定锁定范围主—式锁定系统大了将近锁定后两激光器频率可能会发生移动

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  • In the communication of multiplex system, the DS signal exists Doppler frequency shift for the high dynamic situation of aerocraft.

    复合系统通信中,飞行器动态使扩频信号存在多普勒

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  • The electro optic sampling system constructed with the multiple frequency phase shift scanning method was introduced.

    分析扫描的工作原理,介绍了频移相扫描法构成电光采样测量系统

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  • The measurements utilize a dual-channel system to detect the relevant frequency shift. The AFP antibody is immobilized to the crystal surface via protein a.

    实验采用通道系统进行频率变化测定,并采用蛋白a晶体固定afp抗体

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  • Aimed at the demand of intelligent data management for UM71 frequency-shift capacitance online measurer, a data support system is designed and developed.

    针对UM 71电容在线测试仪测量数据智能化管理要求设计开发UM 71移频电容在线测试仪数据支持系统

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  • 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.

    最后我们TMS320F 2812为核心设计了UM 71轨道信号参数检测系统部分实现了移频轨道信号检测功能

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  • 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.

    本文根据时钟数字原理提出一种新的瞬时方法适用于捷变频雷达测频系统

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  • 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.

    移动环境下ICI的产生主要多普勒引起同时CDMA结合,CD MA系统本身的干扰(MAI)也是影响系统性能的关键因素

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  • The carrier phase shift technique based parallel back-to-back PWM converter is used on the direct-drive wind power system, with a switching frequency as low as 1 kHz.

    风力发电系统需要全功率变流器现有器件功率水平以及开关频率等诸多因素制约下,变流器直接并联的方式具备结构简单、模块化设计、易扩展的优点。

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  • Test results demonstrate that this system can increase the accuracy of railway frequency-shift signal detection effectively, and has high integration level and reliability.

    测试结果表明系统有效地提高铁路移频信号检测准确度具有集成度高可靠性

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  • With the accelerating of the speed, frequency-shift signal detection system established based on traditional detection method is facing great challenges in China.

    随着我国铁路提速基于传统检测方法建立信号检测系统面临极大的考验

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  • We find that dispersive properties inside the micro-cavity lead to frequency shift of the defect modes. The defect modes can be amplified as optical gain is introduced into system.

    另外,当通过复介电常数虚部引入光学增益后,我们发现缺陷在增益介质中放大阈值特性和缺陷折射率的密切相关。

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  • An underwater acoustic modem system is built by employing DSP Software based on M-ary frequency-shift-key (MFSK) modulation and non-coherent detection.

    采用DSP软件方法,研制了一套基于MFSK调制非相干能量检测水声调制解调系统

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  • An underwater acoustic modem system is built by employing DSP Software based on M-ary frequency-shift-key (MFSK) modulation and non-coherent detection.

    采用DSP软件方法,研制了一套基于MFSK调制非相干能量检测水声调制解调系统

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