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首页> 外文期刊>Communications, IET >Mean square error analysis and linear minimum mean square error application for preamble-based channel estimation in orthogonal frequency division multiplexing/offset quadrature amplitude modulation systems
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Mean square error analysis and linear minimum mean square error application for preamble-based channel estimation in orthogonal frequency division multiplexing/offset quadrature amplitude modulation systems

机译：均方误差分析和线性最小均方误差在正交频分复用/偏移正交调幅系统中基于前导的信道估计中的应用

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摘要

In this study, the performance of different preamble-based channel estimation techniques is analysed for orthogonal frequency division multiplexing/offset quadrature amplitude modulation (OFDM/OQAM) modulation systems. Three pilot allocation methods, the pair of pilot, the interference cancellation method, and the interference approximation method are considered. A theoretical expression of the estimation mean square error (MSE) is performed for each of them, which considers the selectivity of the channel and the interferences from all the neighbouring time-frequency positions. Moreover, an application of the linear minimum MSE estimator in OFDM/OQAM is investigated and an analysis of its MSE performance is provided as well. It is shown that, due to the intrinsic interference, the MSE of the channel estimation inevitably reaches an error floor whatever the applied method is. Numerical results show that the theoretical MSE assessments match those obtained by simulation. In addition to the MSE, the bit error rate performance for the different channel estimators is depicted.
机译：在这项研究中，针对正交频分复用/偏移正交幅度调制（OFDM / OQAM）调制系统，分析了不同基于前导的信道估计技术的性能。考虑了三种导频分配方法，一对导频，干扰消除方法和干扰近似方法。对它们中的每一个执行估计均方误差（MSE）的理论表达式，其中考虑了信道的选择性以及来自所有相邻时频位置的干扰。此外，研究了线性最小MSE估计器在OFDM / OQAM中的应用，并对其MSE性能进行了分析。结果表明，由于所固有的干扰，无论采用何种方法，信道估计的MSE都不可避免地达到错误底限。数值结果表明，理论上的MSE评估与通过仿真获得的评估相匹配。除了MSE，还描述了不同信道估计器的误码率性能。

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  • 来源
    《Communications, IET》 |2015年第14期|1763-1773|共11页
  • 作者

    Savaux Vincent; Bader Faouzi;

  • 作者单位

    IETR, Signal, Commun. & Embedded Electron. (SCEE)) Team, Supelec, Rennes, France;

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