研究目的
Investigating the performance of a novel four-level Manchester coding (4-MC) technique for high-speed optical access networks in comparison with 4-PAM and conventional Manchester formats.
研究成果
The 4-MC technique offers a distinct benefit over binary Manchester in terms of spectral efficiency and transmission capacity, and superior sensitivity and better clock and data recovery compared to 4-PAM, making it a potential next-generation intensity modulation format for high-speed optical access networks.
研究不足
The study focuses on short-reach applications where the effect of dispersion can be neglected, potentially limiting its applicability to longer distances without further investigation.
1：Experimental Design and Method Selection:
The study involves the simulation of 4-MC, conventional binary Manchester, and 4-PAM formats for optical transmission links.
2：Sample Selection and Data Sources:
The simulation uses a pseudo-random binary sequence (PRBS) of 210-
3：List of Experimental Equipment and Materials:
Includes a dual-drive Mach-Zehnder modulator (MZM), standard single mode fiber (SSMF), variable optical attenuator (VOA), Erbium-doped fiber amplifier (EDFA), and a PIN photo detector.
4：Experimental Procedures and Operational Workflow:
The 4-MC signal is generated, transmitted through SSMF, attenuated, amplified, detected, and post-processed for analysis.
5：Data Analysis Methods:
The performance is evaluated in terms of receiver sensitivity and spectral efficiency using MATLAB and OptiSystem software.
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