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首页> 外文期刊>Wireless personal communications: An Internaional Journal >Iterative Blind Carrier Frequency Offset Estimation Based on Orthogonal Projection Approach Under Single Data Block for Interleaved OFDMA Uplink
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Iterative Blind Carrier Frequency Offset Estimation Based on Orthogonal Projection Approach Under Single Data Block for Interleaved OFDMA Uplink

机译:交织OFDMA上行链路下基于正交投影方法的正交投影迭代盲载波频偏估计

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摘要

In this letter, an iterative approach based on the orthogonal projection (OP) criterion is presented to estimate carrier frequency offset (CFO) for interleaved orthogonal frequency division multiple access (OFDMA) uplink systems. The proposed estimator includes the center-symmetric trimmed correlation matrix and OP technique. It doesn't require eigen-decomposition and only needs single OFDMA data block. To reduce computation complexity, the proposed estimator iteratively searches for the correct CFO vector by minimizing the objective function using a first-order Taylor series approximation of the CFO vector with the one initially given. Computer simulation is also provided for illustrating the effectiveness of the proposed iterative blind CFO estimator.
机译:在这封信中,提出了一种基于正交投影(OP)标准的迭代方法来估计交织正交频分多址(OFDMA)上行链路系统的载波频率偏移(CFO)。提出的估计器包括中心对称修整相关矩阵和OP技术。它不需要本征分解,只需要单个OFDMA数据块。为了降低计算复杂度,建议的估算器使用CFO向量与初始给定值的一阶泰勒级数逼近来最小化目标函数,从而迭代搜索正确的CFO向量。还提供了计算机仿真来说明所提出的迭代盲CFO估计器的有效性。

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