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학술지 Simple Full-Range Carrier Frequency Offset Estimation for High Speed CO-OFDM
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저자
나해영, 윤천주, 남은수, 최해욱
발행일
201310
출처
Optics Express, v.21 no.20, pp.23896-23906
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.21.023896
협약과제
11PB1100, 차세대 대용량 코히어런트 광OFDM 기술 개발, 남은수
초록
We propose a simple, full-range carrier frequency offset (CFO) algorithm for coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. By applying the Chinese remainder theorem (CRT) to training symbol of single frequency, the proposed CFO algorithm has wide range with shorter training symbol. We numerically and experimentally demonstrate the performance of CRT-based algorithms in a 16-ary quadrature amplitude modulation (QAM) CO-OFDM system. The results show that the estimation range of the CRT-based algorithm is fullrange corresponding to the sampling frequency. Also, the bit error ratio (BER) degradation of the proposed algorithm with one training symbol is negligible. These results indicate that the proposed algorithm can be used as a wide range CFO estimator with an increased data rate in high speed COOFDM systems. ©2013 Optical Society of America.
KSP 제안 키워드
16-ary quadrature amplitude modulation, Bit-error-rate(BER), Carrier frequency offset estimation, Chinese remainder theorem(CRT), Coherent optical orthogonal frequency division multiplexing(CO-OFDM), Full range, High Speed, OFDM systems, Optical orthogonal frequency division multiplexing(O-OFDM), Orthogonal frequency division Multiplexing(OFDM), Quadrature-amplitude modulation(QAM)