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Carrier Frequency Offset Estimation Using Improved Unitary Minimum Output Variance Approaches for Interleaved OFDMA Uplink Systems

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Abstract

This letter deals with the residual carrier frequency offset estimation based on minimum output variance (MOV) criterion without devoting training sequence and pilot symbol for uplink interleaved orthogonal frequency division multiple access systems. It has been shown that the performance of MOV estimator is degraded because the effect of noise. In conjunction with unitary transformation and subspace projection techniques, we present an improved unitary MOV (U-SIMOV) estimator to achieve the high accuracy estimate and low complexity for the noisy case. Computer simulations are provided for illustrating the effectiveness of the proposed approaches.

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Acknowledgments

The authors would like to thank the anonymous reviewers for their valuable and constructive comments, which helped to improve the presentation of the paper.

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  1. Department of Information Technology, Ling Tung University, 1, Ling tung Rd., Taichung, Taiwan, ROC

    Jhih-Chung Chang

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  1. Jhih-Chung Chang
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Correspondence to Jhih-Chung Chang.

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Chang, JC. Carrier Frequency Offset Estimation Using Improved Unitary Minimum Output Variance Approaches for Interleaved OFDMA Uplink Systems. Wireless Pers Commun 85, 1081–1091 (2015). https://doi.org/10.1007/s11277-015-2827-y

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  • DOI: https://doi.org/10.1007/s11277-015-2827-y

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