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학술지 Efficient Chromatic Dispersion Precompensation for Coherent Optical OFDM
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저자
나해영, 윤천주, 전병구, 최해욱
발행일
201501
출처
IEEE Photonics Technology Letters, v.27 no.1, pp.30-33
ISSN
1041-1135
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LPT.2014.2360931
협약과제
13VB5700, 코히어런트 광송수신소자 개발, 권용환
초록
To reduce the guard interval, short-cyclic-prefix coherent optical orthogonal frequency division multiplexing (CO-OFDM) divides a band into two subbands and precompensates for chromatic dispersion (CD) with timing offset. Implementation using full band inverse discrete Fourier transformations (IDFTs), however, can excessively increase hardware complexity. We propose an efficient hardware implementation of IDFT with timing offsets for short-cyclic-prefix CO-OFDM. In addition, the residual intersubband CD induced by quantized timing offset is compensated using subcarrier-based phase rotation. By increasing the number of subbands efficiently and compensating for the residual intersubband CD, the transmission performance can be improved. Simulation results show 112-Gb/s single-channel transmission over a 2250-km standard single-mode-fiber with polarization division multiplexing 16 quadrature amplitude modulation (PDM-16 QAM) using 128 DFT with a 16 guard interval.
키워드
Chromatic dispersion, Optical fiber communication, Orthogonal frequency division multiplexing (OFDM)
KSP 제안 키워드
16 quadrature amplitude modulation(16QAM), Chromatic dispersion(CD), Coherent optical orthogonal frequency division multiplexing(CO-OFDM), Discrete Fourier, Dispersion precompensation, Full-band, Hardware Implementation, Hardware complexity, Optical OFDM, Optical fiber communications, Optical orthogonal frequency division multiplexing(O-OFDM)