Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems
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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IEEE
2017-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8000568/ |
| _version_ | 1819163324030386176 |
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| author | Muyiwa B. Balogun Olutayo O. Oyerinde Fambirai Takawira |
| author_facet | Muyiwa B. Balogun Olutayo O. Oyerinde Fambirai Takawira |
| author_sort | Muyiwa B. Balogun |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-22T17:42:19Z |
| format | Article |
| id | doaj.art-5dc19f3eb94d49118f1d9683128bdb94 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-12-22T17:42:19Z |
| publishDate | 2017-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-5dc19f3eb94d49118f1d9683128bdb942022-12-21T18:18:23ZengIEEEIEEE Photonics Journal1943-06552017-01-019511510.1109/JPHOT.2017.27359028000568Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM SystemsMuyiwa B. Balogun0Olutayo O. Oyerinde1Fambirai Takawira2Electrical and Information Engineering, University of the Witwatersrand, Johannesburg, South AfricaElectrical and Information Engineering, University of the Witwatersrand, Johannesburg, South AfricaElectrical and Information Engineering, University of the Witwatersrand, Johannesburg, South AfricaThis 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.https://ieeexplore.ieee.org/document/8000568/CO-OFDMcarrier frequency offsetblind estimationconstant modulus. |
| spellingShingle | Muyiwa B. Balogun Olutayo O. Oyerinde Fambirai Takawira Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems IEEE Photonics Journal CO-OFDM carrier frequency offset blind estimation constant modulus. |
| title | Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems |
| title_full | Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems |
| title_fullStr | Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems |
| title_full_unstemmed | Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems |
| title_short | Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems |
| title_sort | efficient constant modulus based carrier frequency offset estimation for co ofdm systems |
| topic | CO-OFDM carrier frequency offset blind estimation constant modulus. |
| url | https://ieeexplore.ieee.org/document/8000568/ |
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