Performance of Diffusion-Based MIMO Molecular Communications and Dual Threshold Algorithm

As the nanotechnology becomes more and more mature, the concept of molecular communication emerged and attracted lots of researchers’ attention. The most widespread model for a molecular communication channel is the diffusion-based channel, where the information-carrying molecules propagate randomly in the medium based on Brownian motion. As for multi-input multi-output (MIMO) transmissions, there are not only inter-symbol interference (ISI), some molecules may arrive at the receiver after their intended time-slot, as interference. Another source of interference is the inter-link interference (ILI), which emerges when receiver receive other transmitters’ molecules. In this paper, we study the bit error rate (BER) performance of a molecular communications system having two transmitters and two receiver with two receptors by considering ISI and ILI. Last, dual threshold algorithm is proposed to optimize the system BER.