分析了电力系统频率偏移和谐波对传统感应电能表误差特性的影响。
The influence of frequency deviate or harmonics to the traditional kilowatt hour meter of electromagnetic induction type is analysed in the paper.
如何在系统频率偏移时准确的得到基波及各次谐波的幅值和相角就成为一个重要问题。
So how to calculate amplitude and phase of the fundamental and harmonics accurately when the system frequency has an offset is an important issue.
OFDM系统存在对数据符号同步和载波频率偏移极为敏感的问题。
The OFDM is sensitive to the synchronization of the OFDM symbol and the carriers' frequency excursion.
载波频率偏移是OFDM系统实现的关键问题之一。
Carrier frequency offset is one of the key problems in OFDM system.
但是OFDM技术对频率偏移和相位噪声很敏感，所以同步是OFDM系统中的关键问题。
But OFDM is very sensitive to frequency offset and phase noise, so synchronization is the key problem for OFDM system.
对于多载波系统，载波频率的偏移会导致子信道之间产生干扰。
The offset of carrier frequency can cause interference between subchannels in a multicarrier system.
在卫星导航定位系统中，多普勒频率偏移是影响接收机性能的关键因素之一。
In the satellite navigation and positioning system, Doppler shift is one of the key problems that may degrade the performance of the satellite receiver.
正交频分复用(OFDM)通信系统对频率偏移比较敏感，容易导致系统性能急剧下降。
OFDM (Orthogonal frequency Division Multiplexing) systems are sensitive to frequency offset, which will degenerate the system performance.
本文还给出了基于GPS芯片和CPLD，对系统压控晶振时钟进行校准的实现方法，有效解决了由于长时间使用，晶振自身特性变化，造成的频率偏移现象。
This paper introduces the method of clock calibration to VCXO in system, based on GPS and CPLD. It can solve the problem of frequency offset because of Crystal worse behavior in Long-term use.
在通信系统中，接收机的同步要求精确地估计一些参数，比如载波频率和相位偏移。
In communication systems, the synchronization of the receiver requires to accurately estimate a number of parameters such as the carrier frequency and phase offset.
通过对地面卫星信号覆盖区内的多普勒频率偏移及不确定性范围的计算，给出了卫星导航系统信号的多普勒频率偏移与接收机位置之间的关系。
By calculating the Doppler shift and its uncertainty in the signal covering area, the relation between Doppler shift and the position of the receiver is obtained.
在该系统中采用了自行研制设计的实现全光纤化的两个关键光纤元件：普通单模光纤频率偏移器和普通单模光纤偏振控制器，介绍了此两光纤元件的基本工作原理和设计方法。
Two novel fibre devices, fibre optic frequency shifter and fibre optic polarization controller, are employed in this system. The principle and design method for the two key devices are described.
本发明涉及在正交频分复用（OFDM）接收机中补偿载波频率偏移的方法和系统。
The invention relates to a method and a system for compensating a carrier frequency offset in an orthogonal frequency division multiplexing (OFDM) receiver.
本文分析了采样钟频率偏移对MIMO-OFDM系统接收信号的影响，提出了一种适用于MIMO-OFDM系统的采样钟频率偏移估计算法，即幅度加权最小平方估计法。
The effect of sample frequency offset on MIMO-OFDM signals is exploited. An amplitude weighted least squares estimation of sample frequency offset in MIMO-OFDM systems is presented.
电力系统运行的基本任务是维持系统频率为计划值，且保证频率偏移不超过允许值。
The basic task of power system operation is to maintain frequency to its scheduled value and guarantee frequency error is in a limited range.
基于单相单级光伏并网发电系统，针对传统主动式频率偏移法控制的复杂性，采用了一种新颖的带反馈的主动式频率偏移法。
This paper proposed a novel active frequency drift with feedback based on single-phase single stage PV grid-connected generation system for the complexity of the control in traditional method.
基于单相单级光伏并网发电系统，针对传统主动式频率偏移法控制的复杂性，采用了一种新颖的带反馈的主动式频率偏移法。
This paper proposed a novel active frequency drift with feedback based on single-phase single stage PV grid-connected generation system for the complexity of the control in traditional method.
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