The effect of I/Q imbalance on high-speed optical OFDM transmission links using a real-time transmitter

Konferenz: Photonische Netze - 17. ITG-Fachtagung
12.05.2016 - 13.05.2016 in Leipzig, Deutschland

Tagungsband: ITG-Fb. 264: Photonische Netze

Seiten: 4Sprache: EnglischTyp: PDF

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Habel, Kai; Fernandez del Rosal, Luz; Weide, Stefan; Kottke, Christoph; Koepp, Matthias; Jungnickel, Volker (Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute, Einsteinufer 37, 10587 Berlin, Germany)

In this paper an OFDM transmission system including a FPGA-based real-time transmitter is being investigated. A special focus is set on the influence of I/Q imbalance on the OFDM signal quality. The compensation of I/Q imbalance with a digital signal processing algorithm is presented. The transmitter can generate with a sampling rate of 16 GSa/s, data with 64 Gbit/s error-free in a back-to-back configuration. In this case the I/Q imbalance correction can improve the mean SNR by about 5 dB. A data rate of 21 Gbit/s is achieved for an optical transmission over 30 km. The I/Q imbalance correction algorithm can improve the mean SNR by about 1.5 dB in this case.