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Nonlinear limit of alternative method to 2 × 2 MIMO for LTE RoF system

Nonlinear limit of alternative method to 2 × 2 MIMO for LTE RoF system

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Owing to the limited cell size of eNodeB (eNB), the relay node has emerged as an attractive solution for the long-term evolution (LTE) system. The nonlinear limit of the alternative method to multiple-input and multiple-output (MIMO) based on frequency division multiplexing (FDM) for orthogonal FDM (OFDM) is analysed over varying transmission spans. In this reported work, it is shown that the degradation pattern over the linear, intermixing and nonlinear propagation regions is consistent for the 2 and the 2.6 GHz bands. The proposed bands experienced a linear increase in the error vector magnitude (EVM) for both the linear and the nonlinear regions proportional to the increasing transmission spans. In addition, an optical launch power between −2 and 2 dBm achieved a significantly lower EVM than the LTE limit of 8% for the 10–60 km spans.

References

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      • 1. Wirth, T., Venkatkumar, V., Haustein, T., Schulz, E., Halfmann, R.: ‘LTE-advanced relaying for outdoor range extension’. Proc. IEEE 70th Vehicular Technology Conf. Fall, VTC 2009-Fall, Anchorage, AK, USA, September 2009, pp. 14.
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      • 6. 3GPP: ‘LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); FDD repeater radio transmission and reception’, (3GPP TS 36.106), 10.0.0, (Rel-10), 2011.
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      • 3. Kanesan, T., Ng, W.P., Ghassemlooy, Z., Lu, C.: ‘Theoretical and experimental design of an alternative system to 2 × 2 MIMO for LTE over 60 km directly modulated RoF link’. Proc. IEEE Global Telecommunications Conf., (GLOBECOM), Anaheim, CA, USA, December 2012, pp. 14.
    6. 6)
      • 5. Jansen, S.L., Morita, I., Tanaka, H.: ‘16 × 52.5-Gb/s, 50-GHz spaced, POLMUX-CO-OFDM transmission over 4160 km of SSMF enabled by MIMO processing’. 33rd European Conf. Exhibition of Optical Communication – Post Deadline Papers, (ECOC 2008), Brussels, Belgium, September 2008, pp. 12.
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2013.2972
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