A combined digital linearization and channel estimation approach for IM/DD fast-OFDM systems
نویسندگان
چکیده
A combined digital linearization and channel estimation scheme is proposed experimentally demonstrated for short-reach intensity-modulation direct-detection (IM/DD) optical Fast-OFDM systems. Known 2PAM-Fast-OFDM sequences are used training a memoryless polynomial based adaptive post-distorter FFT-based in IM/DD 4PAM-Fast-OFDM The 2PAM signals transmitted only over the odd SCs of sequences. With compensation scheme, significant BER improvements achieved 10- 22-km length 12.5 Gbit/s SMF links. Compared with conventional Fast-OFDM, receiver sensitivity system improved by about 3 dB at bit error ratio (BER) 10–3, after transmission. In addition, experimental results different bias voltages under strong filtering effects show that approach can deal some degree MZM drift be applied realistic wideband
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ژورنال
عنوان ژورنال: Optical Fiber Technology
سال: 2021
ISSN: ['1068-5200', '1095-9912']
DOI: https://doi.org/10.1016/j.yofte.2021.102725