Robustness analysis of a parallel two-box digital polynomial predistorter for an SOA-based CO-OFDM system

OPTICS COMMUNICATIONS

卷:402

Article

Diouf, C.¹  Younes, M.²  Noaja, A.³  Azou, S.¹  Telescu, M.²  Morel, P.¹  Tanguy, N.² 

[1] ENIB CNRS, UMR 6285, Lab STICC, Brest, France

[2] Univ Bretagne Occidentale, CNRS, UMR 6285, Lab STICC, Brest, France

[3] Mil Tech Acad, Bucharest, Romania

关键词: Coherent optical OFDM;    Semiconductor optical amplifier (SOA);    Digital predistortion;    Linearization;    PAPR reduction;    Robustness analysis;   

DOI  :  10.1016/j.optcom.2017.06.023

来源: Elsevier

【 摘 要 】

The linearization performance of, various digital baseband pre-distortion schemes is evaluated in this paper for a coherent optical OFDM (CO-OFDM) transmitter employing a semiconductor optical amplifier (SOA). In particular, the benefits of using a parallel two-box (PTB) behavioral model, combining a static nonlinear function with a memory polynomial (MP) model, is investigated for mitigating the system nonlinearities and compared to the memoryless and MP models. Moreover, the robustness of the predistorters under different operating conditions and system uncertainties is assessed based on a precise SOA physical model. The PTB scheme proves to be the most effective linearization technique for the considered setup, with an excellent performance-complexity tradeoff over a wide range of conditions. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free