Performance analysis of flow assisted diffusion based molecular communication for D-MoSK

Abstract

Molecular communication is used to form a network of nano devices where bio-molecules are used as information carriers. Information can be encoded as number, type and release time of molecules. In molecule shift keying (MoSK), an encoding scheme, transmitter sends variety of molecule for each bit, which results in increased complexity at the transmitter and the receiver, especially for higher modulation scheme. In this work, we consider depleted molecule shift keying (D-MoSK), an efficient modulation scheme, where different molecules are transmitted for each bit, only when bit value is '1'. This reduces the overall requirement to log-2M for M-ary symbols. In this work, performance analysis of the flow assisted diffusion channel molecular communication is investigated. The effect of flow velocity, interference of time slotted transmission and diffusion coefficient on average symbol error rate and achievable mutual information rate of the channel is derived. Delay introduced by the medium in time slotted transmission is also investigated. Numerical results show lower average symbol error rate and higher achievable information rate for the considered system as compared to no drift MoSK scheme. © 2018 IEEE.