Estimation of the OSNR Penalty Due to In-Band Crosstalk on the Performance of Virtual Carrier-Assisted Metropolitan OFDM Systems
The impact of the in-band crosstalk on the performance of virtual carrier (VC)-assisted direct detection (DD) multi-band orthogonal frequency division multiplexing (MB-OFDM) systems was numerically assessed via Monte-Carlo simulations, by means of a single interferer and 4-ary, 16-ary and 64-ary quadrature amplitude modulation (QAM) formats in the OFDM subcarriers. It was also investigated the influences of the virtual carrier-to-band power ratio (VBPR) and the virtual carrier-to-band gap (VBG) on the DD in-band crosstalk tolerance of the OFDM receiver. It was shown the modulation format order decrease enhances the tolerance to in-band crosstalk. When the VBG is the same for both interferer and selected signal, the interferer VBPR increase is seen to lead to lower optical signal-to-noise ratio (OSNR) penalties due to in-band crosstalk. Considering that the VCs frequencies of the selected and interferer OFDM signals are equal, the increase of the interferer VBG also gives rise to lower OSNR penalties. When the interferer and selected signals bands central frequencies are the same, the change of interferer VBG can attain 11 dB less tolerance to in-band crosstalk of the VC-assisted DD OFDM system. We also evaluate the error vector magnitude (EVM) accuracy of the in-band crosstalk tolerance of the DD OFDM receiver and our results show that the EVM estimations are inaccurate.
This work was supported by Fundação para a Ciência e Tecnologia (FCT) from Portugal through Project MORFEUS-PTDC/EEITEL/2573/2012. The project UID/EEA/50008/2013 is also acknowledged.
- 3.T. Alves, A. Cartaxo, Direct-detection multi-band OFDM metro networks employing virtual carriers and low receiver bandwidth, in Optical Fiber Communication Conference, San Francisco, USA (2014)Google Scholar
- 6.S. Blouza, J. Karaki, N. Brochier, E. Rouzic, E. Pincemin, B. Cousin, Multi-band OFDM for optical networking, in EUROCON 2011—International Conference on Computer as a Tool—Joint with Conftele 2011, Lisbon, Portugal (2011)Google Scholar
- 7.L. Cancela, J. Pires, Quantifying the influence of crosstalk-crosstalk beat noise in optical DPSK systems, in International Conference on Computer as a Tool (EUROCON), Lisbon, Portugal (2011)Google Scholar
- 11.M. Deng, Y. Xingwen, Z. Hongbo, L. Zhenyu, Q. Kun, Nonlinearity impact on in-band crosstalk penalties for 112-gb/s PDM-COOFDM transmission, in Communications and Photonics Conference (ACP), Guangzhou (Canton), China (2012), pp. 1–3Google Scholar
- 14.M. Jeruchim, P. Balaban, K. Shanmugan (eds.), Simulation of Communication Systems: Modeling, Methodology and Techniques, 2nd edn. (Kluwer Academic Publishers, Norwell, MA, USA, 2000)Google Scholar
- 18.J. Pan, P. Isautier, M. Filer, S. Tibuleac, E. Ralph, Gaussian noise model aided in-band crosstalk analysis in ROADM-enabled DWDM networks, in Conference on Optical Fiber Communication, Technical Digest Series, San Francisco, USA (2014)Google Scholar
- 20.B. Pinheiro, J. Rebola, L. Cancela, Impact of in-band crosstalk signals with different duty-cycles in M-QAM optical coherent receivers, in 20th European Conference on Networks and Optical Communications (NOC), London, United Kingdom (2015), pp. 1–6Google Scholar
- 21.B. Pinheiro, J. Rebola, L. Cancela, Assessing the impact of in-band crosstalk on the performance of M-QAM coherent receivers using the error vector magnitude, in 10th Conference on Telecommunications (Conftele), Aveiro, Portugal (2015)Google Scholar
- 22.J. Rebola, A. Cartaxo, Impact of in-band crosstalk due to mixed modulation formats with multiple line rates on direct-detection OFDM optical networks performance, in 16th International Conference on Transparent Optical Networks (ICTON), Graz, Austria (2014)Google Scholar
- 25.R. Shafik, S. Rahman, R. Islam, On the extended relationships among EVM, BER and SNR as performance metrics, in International Conference on Electrical and ComputerEngineering (ICECE), Dhaka, Bangladesh (2006), pp. 408–411Google Scholar
- 28.P. Winzer, A.H. Gnauck, A. Konczykowska, F. Jorge, J.-Y. Dupuy, Penalties from in-band crosstalk for advanced optical modulation formats, in 37th European Conference and Exhibition on Optical Communication, (1), Geneva, Switzerland (2011), pp. 1–3Google Scholar