frequency offset的例句大全

At last, a maximum likelihood estimating method of sampling frequency offset by transmitting two identical OFDM symbol was proposed.

通过连续重发两个相同的OFDM符号，应用最大似然估计方法确定采样频率偏差。

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Secondly, the effects of carrier frequency offset, sampling clock offset, and symbol timing offset on OFDM signals are exploited.

其次本文分析了符号定时误差、采样时钟偏差、频率偏差对解调信号的影响。针对符号定时同步问题，阐述了利用OFDM帧头训练序列同步的方法；

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The main character of this technique is the high-spectral constraint of each subcarrier which results in its non-sensitivity to frequency offset where OFDM enduring.

该技术的主要特点是各子信道具有很高的频谱约束性，对系统频率偏差不敏感，从而克服了OFDM易受频率偏差影响的弱点。

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On the basis of the characteristics of the LEO channel, a pilots-aided frequency offset estimation algorithm for OFDM systems is proposed.

针对LEO信道多径衰落的特性，提出了OFDM系统频率偏差估计算法。

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This thesis analyzes some influences on the performances of OFDM digital communications, which include carrier frequency offset, symbol timing offset and sampling clock offset.

分析了载波频率偏差、符号定时偏差和样值频率偏差对OFDM系统性能的影响。

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However, OFDM system is very sensitive to symbol timing offset and carrier frequency offset, so accurate timing synchronization and frequency synchronization are necessary to OFDM system.

然而OFDM系统对于符号定时偏差和载波频率偏差十分敏感，因此精确的符号定时和频偏估计对于OFDM系统是极其必要的。

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How to eliminate the two problems is the main task of the research of OFDM. In this thesis, we mainly discuss the problem of frequency offset estimation.

如何克服这两个问题是OFDM技术研究的主要方向之一，本文主要是研究OFDM技术中的频率偏差估计问题。

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The 9th order equation of the frequency offset based on Blackman-Harris window and interpolated FFT is derived.

以基于Blackman-Harris窗的加窗插值FFT算法推导出关于频率偏差的9次方程。

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It is concluded that the detection results will not be influenced by frequency offset in the C matrix transformation process of i_p-i_q harmonic current detecting method.

分析指出，ip-iq谐波电流检测方法坐标变换过程中，C变换矩阵的频率偏差对检测结果不构成影响。

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The most critical causes yielding the ISI as well as ICI are symbol timing and carrier frequency offset which are occurred in the OFDM receiver.

而产生ISI和ICI的主要原因是在OFDM系统接收端产生的符号定时偏差和载波频率偏差。

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So, in an OFDM system, finding the symbol timing, the carrier frequency offset, and the sampling rate offset the receiver is important in the recovery of the signal.

因此，在OFDM系统接收机中，定时的确定、载波频率偏差和采样频率偏差的纠正是信号恢复的关键。

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In the dissertation, researching the defects that Peak-to-Average Ratio ( PAR) is high and influenced greatly by frequency offset and time-varying channel in OFDM system, providing the effective settlement measures.

论文针对OFDM技术峰值平均功率比高以及易受频率偏差和时变信道的影响的缺点进行研究，给出有效的解决措施。

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Full offset stack may reduce seismic resolution, because of lower frequency of far offset than that of near offset in raw seismic data, NMO stretching and velocity error.

受原始记录远道频率低于近道频率、动校拉伸、速度误差等因素的影响，满覆盖叠加降低了地震剖面的分辨率。

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Therefore this paper will discuss a method of near offset stack and compare its results with those of full offset stack, indicating that near offset stack can preserve high frequency and suppress random noise.

文中讨论了少道叠加方法，对少道叠加和满覆盖叠加的结果做了分析和对比，认为少道叠加既可以保护高频信息，又可以压制随机噪音。

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Carrier frequency offset estimation and phase deviation estimation are realized using a forward non-data aided algorithm.

用非数据辅助前向估计算法实现了载波频偏和相偏估计。

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For the frequency offset tolerance study, the BLER performances with different MCSs and different offsets are studied here, and then according to the results of simulations, we get the metrics of the frequency offset tolerance. Two kinds of frequency offset estimation are introduced.

对于频偏容忍度的研究，分析了不同调制方式及不同频偏下的误码率性能，并对仿真结果进行分析，得到频偏容忍度值。

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As to carrier frequency offset estimation, a joint estimation base on frequency scanning estimation and ML estimation is used to finish carrier frequency coarse synchronization.

在载波同步中，采用扫频估计和ML算法联合估计方案实现载波粗同步。

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This paper employs the tapped delay line channel model for frequency-selective fading channels to extend a frequency offset blind estimation algorithm based on cyclostationary, which is proposed for flat fading channels, to frequency-selective fading channels. Simulations proves the feasibility of this extension.

根据频率选择性衰落信道的抽头延迟线模型，将针对平坦衰落信道的CS（周期平稳过程理论）频偏盲估计算法扩展到了频率选择性衰落信道，并通过仿真证明这种扩展是可行的。

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Therefore, it is of primary importance to accurately estimate this frequency offset and compensate for it prior to performing detection. This is the task of frequency synchronization.

由此可见，在检测之前对频偏进行准确的估计和有效的补偿是非常重要的，这便是频率同步所要完成的任务。

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Following the introduction of the basic principle of OFDM, some nonideal effects on the performance of OFDM systems are discussed, such as carrier frequency offset, symbol timing offset and sampling clock deviation.

本文在简要介绍了OFDM的基本原理、关键技术的基础上，针对同步问题进行了深入研究。首先分析了同步偏差中的频率偏差、符号定时偏差及采样时钟偏差对系统性能的影响。

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