Affinity-Division Multiplexing for Molecular Communications with Promiscuous Ligand Receptors

A key challenge in Molecular Communications (MC) is low data transmission rates, which can be addressed by channel multiplexing techniques. One way to achieve MC leverage the diversity of different molecule types with respect their receptor binding characteristics, such as affinity and kinetic binding/unbinding rates. In this study, we propose a practical scheme for MC, based on ligand-receptor affinities. This method requires only single type promiscuous receiver side, capable interacting multiple ligand types. We analytically derive mean Bit Error Probability (BEP) over all multiplexed channels function similarity among ligands terms affinities, number receptors, channels, ratio concentrations encoding bit-1 bit-0. investigate impact each design parameter performance system.