Abstract
We propose and demonstrate a 28-GHz optical remote heterodyne RoF link using KK receiver for the first time. An optical SSB modulated signal is obtained utilizing an IQ modulator and two free-running lasers. Due to its minimum phase property, KK algorithm can be adopted to reconstruct the complex 16-QAM signal from the received intensity signal. This scheme is effective in eliminating the SSBI penalty introduced by square-law detection. Through the use of the KK receiver, the power penalty caused by the 80 km SSMF transmission is found to be less than 1 dB with digital CDC post processing. The KK-based receiver can also provide about 2 dB advantage over the traditional receiver at the 7% HD-FEC threshold in the case of 28 GBaud rate transmission over 80 km fiber. Furthermore, as the baud rate increases, the benefit of KK receiving scheme is more obvious and superior than that of the traditional receiving scheme.
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Acknowledgements
This work is supported by the National Natural Science Foundation of China (No. 61420106011 and 61471088) and the Fundamental Research Funds for the Central Universities (Grant No.ZYGX2016J014).
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© 2019 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Cai, Y., Gao, X., Ling, Y., Xu, B., Qiu, K. (2019). 28-GHz RoF Link Employing Optical Remote Heterodyne Techniques with Kramers–Kronig Receiver. In: Liu, X., Cheng, D., Jinfeng, L. (eds) Communications and Networking. ChinaCom 2018. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 262. Springer, Cham. https://doi.org/10.1007/978-3-030-06161-6_34
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DOI: https://doi.org/10.1007/978-3-030-06161-6_34
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