According to the fundamental principle of correlation function,the effe ct of measuring accuracy resulting from frequency deviation is analyzed in this paper.
从相关函数的基本原理出发,分析了频率偏移对信号测量准确度的影响。
On the basis of high precision requirement for input signals in the power system protection and control system,this paper,only for the influence of power system frequency deviation on extracting fundamental harmonic,studies the amplitude error of Fourier algorithm,presents a method of correcting frequency deviation,and further derives the formulas of improved Fourier algorithm.
针对电力系统微机保护和控制系统对输入信号精度的要求 ,研究了电力系统频率偏移对傅立叶算法的影响 ,提出一种消弱频率偏移影响的方法 ,并推导出校正频率偏移的改进傅立叶算法 。
As for digital self excited control system for use with synchronous generator, this paper analyses the influence of power system frequency deviation on automatic excitation regulator, derives the rule of voltage error varying while system frequency deviates from normal rating and presents a kind of correcting method.
本文针对数字式同步发电机自并励静止整流器励磁控制系统 ,研究了电力系统频率偏移对励磁控制的影响 ,导出了调节励磁电压的误差随频率偏移的变化规律 ,并提出了对励磁调节误差进行校正的方法。
Effects of OFDMA system performance caused by frequency offset and synchronization error;
频率偏移和同步误差对OFDMA系统性能的影响
The effect of frequency offset on YBX-1 high-frequency transceiver;
频率偏移对YBX-1型高频收发信机的影响
To solve the problem of frequency offset out of intermediate frequency(IF) bandwidth for microwave and millimeter wave amplitude and phase receivers, an optimal architecture of low-IF quadrature receiver combining with double-sideband suppressed-carrier(DSBSC) was presented.
为解决微波毫米波幅相接收机的频率偏移超过中频带宽的问题,提出了一种低中频正交接收机结合双边带抑载的优化结构。
The principle and the design of quadrature-beamformer are discussed and the effect of the frequency shift on the beam axis is theoretically analyzed.
介绍了正交波束形成器的原理和设计方法,针对频率偏移对波束主轴方向的影响进行了理论分析和讨论,仿真结果验证了理论分析的正确性。
The frequency shift is obtained and compared with the effect of air damping.
推导了吸附效应影响下的频率偏移,并与空气阻尼对谐振频率的影响进行了比较。
As it is, however, it is affected by the computer timing error and the AC signal frequency drift in practice.
但实际运用时，其精度都会受到采样定时误差和信号频率偏移的影响。
The operational principles of photovoltaic generation system and the islanding of grid-connected generation system were analyzed, and the active identification method of islanding: active frequency drift method was proposed.
分析了光伏并网发电系统的工作原理及其孤岛效应现象,提出了主动式孤岛效应识别方法:主动频率偏移法。
In order to reduce the non-detection zone(NDZ),a new frequency drift with voltage drift technique was proposed.
基于三相光伏并网逆变器论述了反孤岛效应策略,同时,为了进一步缩小不可检测区(NDZ)的范围,提出了一种正反馈频率偏移法与正反馈电压偏移法相结合的孤岛检测方法,并阐述了该方法的原理。
frequency deviator
频率偏移器, 频率致偏装置
The Study of Frequency Offset Estimation Algorithms for OFDM Systems;
OFDM系统的频率偏移估计算法研究
A blind frequency offset estimation algorithm for OFDMA
OFDMA系统中一种频率偏移盲估计算法
An Effective Blind Estimation of OFDM Carrier Frequency Offset
一种有效的OFDM载波频率偏移的盲估计
Non-Detection Zone of Slip-Mode Frequency Shift Method
滑模频率偏移法的孤岛检测盲区分析
Research on the Estimation of Frequency Offset in OFDM System;
正交频分复用系统频率偏移估计的研究
prestack F-K migration method
叠前频率-波数域偏移法
A mismatch in real power results in a frequency deviation.
有功的不平衡将会引起频率的偏移。
3D data wave equation migration in frequency-wave number domain
三维地震资料频率-波数域波动方程偏移
Frequency Field Super-resolution Reconstruction Based on Estimation Offset of Matrix Rank
基于矩阵秩估计偏移量的频域超分辨率重建
Heart Rate Variability Analysis on ECG ST-segment Deviation Episodes Based on the Time-frequency Method;
时频分析方法用于心电信号ST段偏移时段的心率变异性分析
W is the radian frequency deviation from the center frequency
△W是角频率与中心频率的偏离值。
△W is the radian frequency deviation from the center frequency.
△W 是角频率与中心频率的偏离值。
It is made clear through the theoretical analysis that the frequency shift is dependent on the modulation frequency, thermal time constant, bias current of the laser diode and so on.
理论分析表明频移幅度与调制频率、时间常数和半导体激光器的偏置电流等物理量有关。
In a first approximation, the departure from a constant amplitude vs frequency characteristic will be a characteristics with a linear slop that will vary with time.
采用一级近似,则可认为对频率特性曲线的等幅偏移是一具有时变线性斜率的特性曲线.
drift cancelled frequency synthesizer
漂移抵消式频率合成器
This is found by observing the doppler shift in the frequency of the radio signals broadcast from the satellite.
这是通过观测卫星所发射的无线电信号频率中多普勒偏移来确定的。
Zero-IF receiver and suppression methods for DC-offset;
零中频接收机及其直流偏移抑制方法