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Novel bandwidth efficient time-domain multiplexing with linear prolate functions for optical communications

This work develops the multicarrier modulation (MCM) scheme tailored to optical communications where the transceiver is composed of: (i) radio frequency (RF) MCM sending end, (ii) electro-optical (RF-To-Optical, RTO) up converter, (iii) optical transmission link, (iv) Optical-To-RF (OTR) down converter, and (v) RF MCM receiver. The approach follows the system model of Optical Orthogonal Frequency Division Multiplexing (OFDM) using sinusoidal subcarriers with this paper contribution in the deployment of the linear prolate functions (LPFs) as “subcarriers”. This is to increase bandwidth efficiency and provide resilience against imperfections in optical medium. Specifically, the proposed generalization of OFDM takes advantage of unique features of orthogonal and bandlimited bases of LPFs which are known to be maximally concentrated in time as well as in frequency and invariant to Fourier Transform.