Realtime Implementation of Square 16-QAM Transmission System

Al-Bermani A, Wördehoff C, Hoffmann S, Puntsri K, Rückert U, Noé R (2011)
Presented at the SPIE Eco-Photonics, Strasbourg, France.

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Abstract
Combination of quadrature amplitude modulation with coherent detection is attractive for optical transmission systems, since it permits an increase of data rate without increasing the symbol rate or the required bandwidth. 16-point Quadrature Amplitude Modulation (16-QAM) is most interesting in this context. In-phase (I) and quadrature (Q) signals transmit 2 bit each. Together with polarization division multiplex this amounts to 8 bit/symbol. 2.5 Gbit/s synchronous coherent 16-QAM data is transmitted and received in a realtime intradyne setup with BER below FEC (7% overhead) threshold. A phase noise tolerant feedforward carrier recovery concept with hardware-efficient implementation was tested. Transmission was error-free in a back-to-back electrical test for various PRBS lengths. The carrier recovery does not contain any feedback loop and is therefore highly tolerant against laser phase noise.
Publishing Year
Conference
SPIE Eco-Photonics
Location
Strasbourg, France
Conference Date
2011-03-28
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Cite this

Al-Bermani A, Wördehoff C, Hoffmann S, Puntsri K, Rückert U, Noé R. Realtime Implementation of Square 16-QAM Transmission System. Presented at the SPIE Eco-Photonics, Strasbourg, France.
Al-Bermani, A., Wördehoff, C., Hoffmann, S., Puntsri, K., Rückert, U., & Noé, R. (2011). Realtime Implementation of Square 16-QAM Transmission System. Presented at the SPIE Eco-Photonics, Strasbourg, France.
Al-Bermani, A., Wördehoff, C., Hoffmann, S., Puntsri, K., Rückert, U., and Noé, R. (2011).“Realtime Implementation of Square 16-QAM Transmission System”. Presented at the SPIE Eco-Photonics, Strasbourg, France.
Al-Bermani, A., et al., 2011. Realtime Implementation of Square 16-QAM Transmission System. Presented at the SPIE Eco-Photonics, Strasbourg, France.
A. Al-Bermani, et al., “Realtime Implementation of Square 16-QAM Transmission System”, Presented at the SPIE Eco-Photonics, Strasbourg, France, Proc. SPIE 8065, 806519, 2011.
Al-Bermani, A., Wördehoff, C., Hoffmann, S., Puntsri, K., Rückert, U., Noé, R.: Realtime Implementation of Square 16-QAM Transmission System. Presented at the SPIE Eco-Photonics, Strasbourg, France (2011).
Al-Bermani, Ali, Wördehoff, Christian, Hoffmann, Sebastian, Puntsri, Kidsanapong, Rückert, Ulrich, and Noé, Reinhold. “Realtime Implementation of Square 16-QAM Transmission System”. Presented at the SPIE Eco-Photonics, Strasbourg, France, Proc. SPIE 8065, 806519, 2011.
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