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在基于占空比复用技术(DCDM)的基础上,提出了采用双极性归零(RZ)信号来实现占空比复用技术,即双极性-占空比复用技术(APDCDM)。分析了其复用与解复用的原理,利用Matlab设计了APDCDM系统的解复用器。通过OptiSystem与Matlab的联合仿真,设计了3个用户复用的APDCDM光纤传输系统,验证了APDCDM用于光纤通信系统的可行性,并通过信号能量的分析,说明APDCDM较DCDM能承载更多的用户。
Based on the Duty Cycle Multiplexing (DCDM) technique, a novel method of duty cycle multiplexing using Bipolar Zero Return (RZ) signal is proposed, that is, bipolar - duty cycle multiplexing (APDCDM) . The principle of multiplexing and demultiplexing is analyzed. Demodulator of APDCDM system is designed by Matlab. Through the co-simulation of OptiSystem and Matlab, we designed three multiplexed APDCDM optical fiber transmission systems and verified the feasibility of using APDCDM in optical fiber communication system. The analysis of signal energy shows that APDCDM can carry more users than DCDM .