Characterization and Performance Optimization of Heterogeneous Media-Based Mobile Molecular Communication Systems

In this letter, we study a three-dimensional heterogeneous media-based mobile molecular communication (MC) system, with the communicating devices as point transmitters and passive spherical-shaped receiver nano-machines. For the shorter time range, the diffusion process faces internal diffusivity fluctuations, due to which communicating devices and the information-carrying molecule’s diffusivity exhibit stochastic behavior. We propose a stochastic diffusivity-based mobile MC system model, which considers the non-Gaussian Brownian displacement of molecules and characterize it by the channel impulse response, and derive its mean. We consider the molecule’s constrained time-varying Poisson statistical diffusive channel model at a high inter-symbol interference regime and analyze the channel performance in terms of the bit error rate and channel capacity. Furthermore, the numerical results are verified through particle-based simulations.