Abstract We introduces a novel architecture for next generation passive optical network (PON) based on the employment of sparse code multiple access (SCMA) combined with orthogonal frequency division multiplexing (OFDM) modulation, in which the binary data is directly encoded to multi-dimensional codewords and then spread over OFDM subcarriers. The feasibility of SCMA-OFDM-PON is verified with experimental demonstration. We show that the SCMA-OFDM offers 150% overloading gain in the number of optical network units compared with the orthogonal frequency division multiplexing access. Highlights A SCMA-OFDM scheme is proposed for passive optical network. An overloading gain of 150% in the number of optical network units is achieved. The feasibility of SCMA-OFDM-PON is verified with experimental demonstration.
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