Chinese Optics Letters, 2016, 14 (5): 050608, Published Online: Aug. 6, 2018  

Direct-detection OFDM-QPSK system performance improvement enabled by DFT spread and receiver-based ISFA algorithm Download: 820次

Author Affiliations
Education Ministry Key Laboratory of Electromagnetic Wave Information Science, Information Science and Engineering School, Fudan University, Shanghai 200433, China
Abstract
We experimentally demonstrate a direct-detection orthogonal-frequency-division-multiplexing quadrature-phase-shift-keying (OFDM-QPSK) system that is capable of delivering a 32 Gbaud OFDM-QPSK signal over 7 km single-mode fiber-28 (SMF-28). Intra-symbol frequency-domain averaging (ISFA) channel response estimation is applied to suppress in-band noise, while discrete Fourier transform-spread (DFT-spread) is used to reduce the peak-to-average power ratio (PAPR) of the transmitted OFDM signal. With the aid of ISFA-based channel estimation and PAPR reduction enabled by DFT-spread, the bit-error ratio of the system after 7 km SMF-28 transmission can be improved from 2×10 3 to error-free when the received optical power is 8.5 dBm.

Jie Su, Xinying Li, Jianjun Yu. Direct-detection OFDM-QPSK system performance improvement enabled by DFT spread and receiver-based ISFA algorithm[J]. Chinese Optics Letters, 2016, 14(5): 050608.

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