期刊
2022 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE, ACP
卷 -, 期 -, 页码 1026-1029出版社
IEEE
DOI: 10.1109/ACP55869.2022.10089064
关键词
ASCM; analog domain; DAC/ADC; frequency offset estimation
资金
- National Natural Science Foundation of China [61871415]
This paper studies the method of subcarrier demultiplexing in an ASCM system and proposes a FO estimation and compensation scheme based on spectral dip searching and local subcarrier frequency adjusting.
ASCM systems implementing subcarriers multiplexing and demultiplexing in the analog domain, could effectively improve the tolerance to fiber nonlinearity and dispersion, and moreover reduce the requirements for sampling rate and bandwidth of DACs/ADCs. However, the integrity of low symbol rate subcarriers in an ASCM system is more sensitive to FO. Aiming at the method of analog domain subcarrier demultiplexing in an ASCM system, this paper proposes a FO estimation and compensation scheme based on spectral dip searching and local subcarrier frequency adjusting. The simulation result shows that the estimation accuracy of proposed scheme can reach the order of 10MHz, and the cost of Q value is less than 0.05dB.
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