Fast carrier frequency offset compensation in OFDM systems

Dong Seog Han; Jae Hyun Seo; Jung Jin Kim

doi:10.1109/30.964122

Fast carrier frequency offset compensation in OFDM systems

Dong Seog Han, Jae Hyun Seo, Jung Jin Kim

School of Electronics Engineering

Kyungpook National University

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

A new coarse carrier frequency synchronization algorithm is proposed that can estimate a coarse carrier frequency offset using only two symbols in the frequency domain for orthogonal frequency division multiplexing (OFDM) systems. The problem of conventional carrier frequency synchronization algorithms is that they require many symbols to compensate for a carrier frequency offset when the offset is close to +0.5 or -0.5, where the frequency is normalized to the subcarrier space. In contrast, the proposed algorithm estimates a coarse carrier frequency offset of around +0.5 or -0.5, thereby reducing the remaining carrier frequency offset to within -0.25 ∼ +0.25. As a result, the proposed algorithm can significantly reduce the time required to synchronize a carrier frequency.

Original language	English
Pages (from-to)	364-369
Number of pages	6
Journal	IEEE Transactions on Consumer Electronics
Volume	47
Issue number	3
DOIs	https://doi.org/10.1109/30.964122
State	Published - Aug 2001

Keywords

Carrier recovery
OFDM
Rayleigh fading cahnnel

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10.1109/30.964122

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title = "Fast carrier frequency offset compensation in OFDM systems",

abstract = "A new coarse carrier frequency synchronization algorithm is proposed that can estimate a coarse carrier frequency offset using only two symbols in the frequency domain for orthogonal frequency division multiplexing (OFDM) systems. The problem of conventional carrier frequency synchronization algorithms is that they require many symbols to compensate for a carrier frequency offset when the offset is close to +0.5 or -0.5, where the frequency is normalized to the subcarrier space. In contrast, the proposed algorithm estimates a coarse carrier frequency offset of around +0.5 or -0.5, thereby reducing the remaining carrier frequency offset to within -0.25 ∼ +0.25. As a result, the proposed algorithm can significantly reduce the time required to synchronize a carrier frequency.",

keywords = "Carrier recovery, OFDM, Rayleigh fading cahnnel",

author = "Han, {Dong Seog} and Seo, {Jae Hyun} and Kim, {Jung Jin}",

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AU - Han, Dong Seog

AU - Seo, Jae Hyun

AU - Kim, Jung Jin

PY - 2001/8

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N2 - A new coarse carrier frequency synchronization algorithm is proposed that can estimate a coarse carrier frequency offset using only two symbols in the frequency domain for orthogonal frequency division multiplexing (OFDM) systems. The problem of conventional carrier frequency synchronization algorithms is that they require many symbols to compensate for a carrier frequency offset when the offset is close to +0.5 or -0.5, where the frequency is normalized to the subcarrier space. In contrast, the proposed algorithm estimates a coarse carrier frequency offset of around +0.5 or -0.5, thereby reducing the remaining carrier frequency offset to within -0.25 ∼ +0.25. As a result, the proposed algorithm can significantly reduce the time required to synchronize a carrier frequency.

AB - A new coarse carrier frequency synchronization algorithm is proposed that can estimate a coarse carrier frequency offset using only two symbols in the frequency domain for orthogonal frequency division multiplexing (OFDM) systems. The problem of conventional carrier frequency synchronization algorithms is that they require many symbols to compensate for a carrier frequency offset when the offset is close to +0.5 or -0.5, where the frequency is normalized to the subcarrier space. In contrast, the proposed algorithm estimates a coarse carrier frequency offset of around +0.5 or -0.5, thereby reducing the remaining carrier frequency offset to within -0.25 ∼ +0.25. As a result, the proposed algorithm can significantly reduce the time required to synchronize a carrier frequency.

KW - Carrier recovery

KW - OFDM

KW - Rayleigh fading cahnnel

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JO - IEEE Transactions on Consumer Electronics

JF - IEEE Transactions on Consumer Electronics

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Fast carrier frequency offset compensation in OFDM systems

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Keywords

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