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Exact Signal Model and New Carrier Frequency Offset Compensation Scheme for OFDM

Carrier frequency offset (CFO) causes spectrum misalignment of transmitter and receiver filters. This misalignment leads to energy loss and distortion of received signal, resulting in performance degradation of the whole system. However, these issues are often overlooked by existing works. This pape...

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Published in:	IEEE transactions on wireless communications 2012-02, Vol.11 (2), p.550-555
Main Authors:	Xie, Baile, Qiu, Wenxun, Minn, Hlaing
Format:	Article
Language:	English
Subjects:	Applied sciences Bit error rate Carrier frequencies Carrier frequency offset CFO compensation Channel estimation Compensation Distortion Energy loss Estimation Exact sciences and technology Information, signal and communications theory Misalignment Multiplexing OFDM Offsets Orthogonal Frequency Division Multiplexing Oscillators preamble design Radiocommunications Receivers Signal and communications theory signal model Spectra spectrum misalignment Telecommunications Telecommunications and information theory Training Transmitters. Receivers Wireless communication
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container_title	IEEE transactions on wireless communications
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creator	Xie, Baile Qiu, Wenxun Minn, Hlaing
description	Carrier frequency offset (CFO) causes spectrum misalignment of transmitter and receiver filters. This misalignment leads to energy loss and distortion of received signal, resulting in performance degradation of the whole system. However, these issues are often overlooked by existing works. This paper presents an exact signal model for OFDM that takes into account the CFO-induced spectral misalignment and related aliasing effects. Incorporating these practical issues, we also propose a new preamble structure and a new CFO compensation approach to mitigate their negative effects. Theoretical analysis and simulation results substantiate the importance of the exact signal model and the advantage of the proposed CFO compensation scheme.
doi_str_mv	10.1109/TWC.2011.120611.111490
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This misalignment leads to energy loss and distortion of received signal, resulting in performance degradation of the whole system. However, these issues are often overlooked by existing works. This paper presents an exact signal model for OFDM that takes into account the CFO-induced spectral misalignment and related aliasing effects. Incorporating these practical issues, we also propose a new preamble structure and a new CFO compensation approach to mitigate their negative effects. 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source	IEEE Electronic Library (IEL) Journals
subjects	Applied sciences Bit error rate Carrier frequencies Carrier frequency offset CFO compensation Channel estimation Compensation Distortion Energy loss Estimation Exact sciences and technology Information, signal and communications theory Misalignment Multiplexing OFDM Offsets Orthogonal Frequency Division Multiplexing Oscillators preamble design Radiocommunications Receivers Signal and communications theory signal model Spectra spectrum misalignment Telecommunications Telecommunications and information theory Training Transmitters. Receivers Wireless communication
title	Exact Signal Model and New Carrier Frequency Offset Compensation Scheme for OFDM
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