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首页> 外文期刊>Wireless personal communications: An Internaional Journal >Zadoff-Chu Sequence Based Timing Offset Estimation for OFDM Systems
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Zadoff-Chu Sequence Based Timing Offset Estimation for OFDM Systems

机译:基于Zadoff-Chu序列OFDM系统的定时偏移估计

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摘要

In this article, timing synchronization in OFDM is attained with the help of Zadoff-Chu sequence as a training symbol. An algorithm based on the cross-correlation property of fractional Fourier transform (FRFT) is proposed to generate a new timing metric. In this algorithm, cross correlation of received signal and Z-Chu sequence is taken at the receiver side in FRFT domain. The mathematical analysis of proposed estimator has been done and the variance of timing metric is obtained under the effect of AWGN channel. The simulation result shows that the variance of timing metric decreases as signal to noise ratio increases. The mean and MSE of the timing offset is simulated under HYPERLAN indoor channel (type-A). The proposed estimation method has been compared with existing methods and established as a better method to combat timing offset.
机译:在本文中,在Zadoff-Chu序列作为训练符号的帮助下实现了OFDM中的定时同步。 提出了一种基于分数傅里叶变换(FRFT)的互相关性的算法,以产生新的定时度量。 在该算法中,在FRFT域中的接收器侧拍摄接收信号和Z-CHU序列的互相关。 已经完成了所提出的估计器的数学分析,并在AWGN通道的效果下获得定时度量的方差。 仿真结果表明,定时度量的方差随着信噪比的增加而降低。 定时偏移的平均值和MSE在Hyperlan室内通道(类型A)下模拟。 已经将所提出的估计方法与现有方法进行比较,并建立为打击定时偏移的更好方法。

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