Subcarrier multiplexing helps carry multiple RF data streams over a single optical carrier, thereby saving on the number of lasers. The RF data can be amplitude modulated (ASK), or frequency modulated (FSK) or phase modulated (PSK). SCM (also known as SCMA, SubCarrier Multiple Access) is used in passive optical network (PON) access infrastructures as a. These penalties come in different forms, although they all have the same degrading effects for the system in question. Ospina, Carina Castineiras Carrero, Haïk Mardoyan, Amirhossein Ghazisaeidi, Rajiv Boddeda, Peng Li, Lei Zhang, Jie Luo, and Jérémie Renaudier R. The. Digital subcarrier multiplexing (DSCM) systems offer flexibility and software configurability, making them promising for point-to-multipoint (P2MP) communications. Meanwhile, DSCM systems exhibit enhanced communication damage tolerance and capabilities for damage monitoring and compensation.
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