Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems

Muyiwa B. Balogun; Olutayo O. Oyerinde; Fambirai Takawira

doi:10.1109/JPHOT.2017.2735902

Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems

Muyiwa B. Balogun, Olutayo O. Oyerinde, Fambirai Takawira

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

8 Scopus citations

Abstract

This paper proposes a blind carrier frequency offset (CFO) estimation method for coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems, using constant modulus signaling. The proposed scheme is based on a robust cost-function, which deviates from the common assumption that the channel frequency response slowly varies either in time or frequency domain. The proposed method adopts a cost-function similar to the Godard's method for blind channel equalization. Using Monte Carlo simulations, the proposed method is shown to offer a superior performance compared to prominent existing methods, in a practical optical link scenario. Also, we show that the proposed cost-function can be approximated and expressed in a closed-form in such a way that the CFO estimate is obtained using only three trial values.

Original language	English
Article number	8000568
Journal	IEEE Photonics Journal
Volume	9
Issue number	5
DOIs	https://doi.org/10.1109/JPHOT.2017.2735902
State	Published - 1 Oct 2017
Externally published	Yes

Keywords

CO-OFDM
blind estimation
carrier frequency offset
constant modulus.

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1109/JPHOT.2017.2735902

Cite this

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title = "Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems",

abstract = "This paper proposes a blind carrier frequency offset (CFO) estimation method for coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems, using constant modulus signaling. The proposed scheme is based on a robust cost-function, which deviates from the common assumption that the channel frequency response slowly varies either in time or frequency domain. The proposed method adopts a cost-function similar to the Godard's method for blind channel equalization. Using Monte Carlo simulations, the proposed method is shown to offer a superior performance compared to prominent existing methods, in a practical optical link scenario. Also, we show that the proposed cost-function can be approximated and expressed in a closed-form in such a way that the CFO estimate is obtained using only three trial values.",

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AB - This paper proposes a blind carrier frequency offset (CFO) estimation method for coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems, using constant modulus signaling. The proposed scheme is based on a robust cost-function, which deviates from the common assumption that the channel frequency response slowly varies either in time or frequency domain. The proposed method adopts a cost-function similar to the Godard's method for blind channel equalization. Using Monte Carlo simulations, the proposed method is shown to offer a superior performance compared to prominent existing methods, in a practical optical link scenario. Also, we show that the proposed cost-function can be approximated and expressed in a closed-form in such a way that the CFO estimate is obtained using only three trial values.

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Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems

Abstract

Keywords

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