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학술지 Companding Transform Based SPM Compensation in Coherent Optical OFDM Transmission
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저자
정환석, 장순혁, 김광준
발행일
201112
출처
Optics Express, v.19 no.26, pp.B702-B709
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.19.00B702
협약과제
11MI1400, 100Gbps급 이더넷 및 광전송기술개발, 김광준
초록
We demonstrate a mitigation of fiber nonlinearity based on μ-law companding transform in coherent optical OFDM transmissions. High peakto- average power ratio (PAPR) increases fiber nonlinear impairments caused by the Kerr effect in optical fiber. The μ-law companding modifies amplitude profile of OFDM signal with time domain signal processing, which reduces high PAPR of OFDM signal. The effects of companding parameter on noise enhancement and PAPR variation are presented. The impacts of companding transform on system performances are evaluated in a single polarization system as well as polarization multiplexed system. The resolution of analog-to-digital converter (ADC), dispersion map of transmission link, and launch power tolerance are also considered. The results of bit-error-rate (BER) measurements show that the μ-law companding improves OSNR margin over 5.5 dB after transmission of 1, 040 km over SMF. © 2011 Optical Society of America.
KSP 제안 키워드
Analog to digital converter(ADC), Average Power, Bit-error-rate(BER), Coherent optical orthogonal frequency division multiplexing(CO-OFDM), Dispersion map, High PAPR, Kerr Effect, Noise enhancement, Nonlinear impairments, OFDM signal, OFDM transmission