But OFDM is very sensitive to synchronization error, especially the symbol synchronization error.
但是OFDM对同步误差十分敏感,特别是符号同步误差。
But it is sensitive to synchronization error, and especially the frequency synchronization error.
但是OFDM对同步误差十分敏感,特别是对于频率同步误差。
In order to enhance the precision of the system, and to reduce synchronization error, this paper adopts hardware synchronization.
为了提高系统的精度,采用硬件同步以减少同步误差。
The system model is introduced and the probability of error in receiver as a function of symbol synchronization error is deduced.
给出了该系统模型,推导了PAM通信系统符号同步误差对收端误码率的影响。
However OFDM and MIMO OFDM systems are very sensitive to time and frequency synchronization errors, especially the frequency synchronization error.
但OFDM系统和MIMO OFDM系统对时间和频率同步误差很敏感,特别是频率同步误差。
Triggering time synchronization error model is derived, and based on phase noise model of frequency source, random synchronization error is considered.
本文建立了触发时间同步误差模型,结合频率源相位噪声模型,初步分析了随机型时间同步误差对成像的影响。
Phase errors is introduced in echo demodulation process because of the frequency synchronization error, and then, the final focus result will be deteriorated.
在接收端解调过程中,该频率同步误差会引入一定的相位误差,进而影响下一步的成像处理。
A phase error model, in which the time synchronization error, frequency synchronization error and motion error are considered, reveals the sources of phase errors.
同步以及运动误差会引入相位误差,本文中提出了相位误差模型。
Synchronization error will lead to inter symbol interference as well as inter carrier interference. Therefore, synchronization is extremely crucial to OFDM systems.
同步错误不但会导致符号间干扰,还会导致信道间干扰,因此同步是OFDM的关键技术。
Since the synchronization error is independent of information signal, the chaotic modulation for large amplitude and fast varying information signals can be achieved.
由于同步误差与信息信号无关,从而实现了大幅度、快时变信息信号的混沌调制通信。
Secondly, the phase synchronization error can not overrun a limit which is requested by elevation accuracy demand during the whole interferometric data acquirement time.
二是在整个干涉数据的录取时间里,主动和被动两个雷达载波相位同步误差不能超过高程测量的精度要求所允许的误差。
Numerical results demonstrate that the phase variations caused by multipath time delays may influence accuracy of the mean of time synchronization error spectral estimation.
数值计算结果表明,多径分量的相位变化会影响时间同步误差谱估计均值的准确性。
Simulation results show that BER caused by synchronization error is consistent with theoretical calculation of the SIR. Therefore, The reliability of the method is verified.
实验结果表明,同步偏差带来的系统误码率和分析方法理论计算得到的信干比是一致的。
Initiation last time synchronization error analysis showed that the design of flexible network detonation initiation time synchronization error initiation meet the requirements.
最后的同步起爆时间误差分析表明,所设计出的柔性起爆网络起爆时间误差满足同步起爆的要求。
Uncertain Chen's chaotic synchronization error system is asymptotically stabilized to the equilibrium point, and then sufficient conditions for robust synchronization are obtained.
使具有不确定扰动的陈氏混沌同步误差系统渐近镇定到平衡点,并且获得其充分条件。
The orthogonal multicarrier modulation, which is the main character of OFDM, determines that it is very sensitive to both timing synchronization error and carrier frequency offset.
OFDM系统自身的正交多载波调制特点,决定了其对定时误差和载波频率偏差十分敏感。
And the masking of the generalized identical synchronization was simulated by pulse signal. The results show that the two shortcomings of synchronization error and unmasking chaotic mask...
用脉冲信号作为伪装信号对广义恒等同步的混沌伪装进行了模拟。模拟结果表明,广义恒等同步的伪装克服了恒等自同步伪装的同步误差和遭破译的两大缺点。
When a synchronization error exists, the orthogonality between sub-carriers can't be maintained, serious inter-carrier interference is introduced and demodulation performance will be degraded greatly.
当存在同步错误时,子载波之间的正交性遭到破坏,从而引起严重的载波间干扰,使解调性能大大下降。
Upon detection of an error during the synchronization downstream, the WorkloadInjector process instance will generate a Notification in the form of a Human Task.
在同步下游期间检测到错误后,WorkloadInjector流程实例将以HumanTask的形式生成一个Notification。
A lack of synchronization can be a modeling error if more than the desired process behaviors occur, but it's not always an error (unlike a deadlock).
如果出现的流程行为超过需要,则缺乏同步便是一个建模错误,但它并非始终是一个错误,这一点与死锁不同。
The reason of synchronized error of DNP time synchronization is analyzed, and the improved means is given.
分析了DNP规约时间同步中同步误差的产生原因,并给出了改进方法;
Error, no synchronization on method.
错误,没有为方法加上同步限制。
In the vast majority of cases, you will not — synchronization works just fine, works on all JVMs, is understood by a wider range of developers, and is less error-prone.
大多数情况下,您不应当选择它——synchronized工作得很好,可以在所有JVM上工作,更多的开发人员了解它,而且不太容易出错。
The problems of the correction of track error of discrete dot and the emersion control of time synchronization are discussed.
讨论了飞机离散点航迹误差的修正、插值算法以及时间同步播放控制问题。
The time correction error of substation clock synchronization, the clock precision of automation equipment and the time correction interval are quantitatively analyzed.
定量分析了变电站时钟同步的校时误差、自动化装置时钟精度及基于两者的校时时间间隔确定等问题。
Comparing with the traditional code tracking method, it is made for fast synchronization and maintenance. It also avoids the error of the JPL approximation algorithm.
与传统的码跟踪方法相比,更有利于迅速同步和稳定保持,避免了JPL近似算法带来的误差。
The Max phase error and synchronization build time can be changed through the setting of different K.
通过设置计数器的K值,可改变电路的最大相位误差及同步建立时间等性能。
To demodulate GMSK signal, DSP is used in receiver to achieve error spectrum estimation, bit synchronization recovery and decode.
为了实现GMSK信号解调,接收机中dsp实现了调制信号的误差频谱估计、位同步恢复及译码。
The performance of synchronization tracking using pilot is analyzed, followed by a numerical method to determine the optimal lock loop parameters to minimize average bit error rate (BER).
分析了利用导频同步跟踪的性能,以及提出了一个数值方法确定最优环路参数以最小化误码率。
A method for synchronization of two systems with parameters perturbation is presented, which combines the error feedback approach with the parameter adaptive control way.
结合误差反馈同步方法和参数自适应同步方法,使参数不同的两个系统达到同步,数值计算结果也表明同步效果很好。
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