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There has been much interest in the non-linear frequency-division multiplexing (NFDM) transmission scheme in the optical fibre communication system. Up to date, most of the demonstrated NFDM schemes have employed only single polarisation for data transmission. Employing both polarisations can potentially double the data rate of NFDM systems. We investigate in simulation a dual-polarisation NFDM transmission with data modulation on the b-coefficient. First, a transformation that facilitates thearXiv:1902.07619v1 fatcat:w3qftjmusvcgpe4ywdjap3ecqe