Abstract
In this paper, we propose and experimentally demonstrate a peak-to-average power ratio (PAPR) reduction scheme based on a new spreading code in direct detection optical orthogonal frequency division multiplexing (OFDM) system. The new spreading code with low cross correlation and high auto-correlation can support \(2N+1\) users. Thus, \(2N+1\) users or data symbols can be transmitted over only N subcarriers. The experimental results show that, after transmission over 70 km single-mode fiber, at the bit error rate of \(10^{-3}\), with fiber launch power of 2.75 dBm, the receiver sensitivity can be improved 2.1 dB by using the proposed scheme based on new spreading code. The PAPR can be reduced about 4.6 dB, compared with the original OFDM signal at a complementary cumulative distribution function of \(10^{-4}\).
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (61307087, 61377079), by the Open Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), by the Scientific Research Foundation for the Returned Oversea Chinese Scholars, State Education Ministry of China and by the Fundamental Research Funds for the Central Universities and Young Teachers Program of Hunan University.
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Maivan, L., He, J., Chen, M. et al. A PAPR reduction scheme based on a new spreading code in optical direct detection OFDM system. Photon Netw Commun 31, 155–161 (2016). https://doi.org/10.1007/s11107-015-0569-0
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DOI: https://doi.org/10.1007/s11107-015-0569-0