상세정보
학술지
Simple Full-Range Carrier Frequency Offset Estimation for High Speed CO-OFDM
- 발행일
- 201310
- 출처
- Optics Express, v.21 no.20, pp.23896-23906
- ISSN
- 1094-4087
- 출판사
- Optical Society of America(OSA)
- 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)