Designing OCDM-Based Multi-User Transmissions

Orthogonal chirp division multiplexing (OCDM) is a fairly new multi-carrier scheme that employs the discrete Fresnel transform (DFnT) to digitally modulate data onto orthogonal chirps. Most work surrounding OCDM has been done in the context of optical networks and single user wireless systems. Hence, there is no literature regarding multiple access in OCDM. This paper introduces a novel data multiplexing technique that leverages the properties of the DFnT to independently process smaller sub-blocks, thus enabling multiple access and low complexity equalization. Additionally, this paper employs a joint multi-user processing technique and compares its performance to the proposed scheme.