A novel modulation technique in diffusion based molecular communication and its performance analysis

Molecular communication (MC) is a promising bio-inspired paradigm, in which molecules are used to encode, transmit, and receive information at the nanoscale. One of the main challenges in MC is the inter symbol interference (ISI) caused by the nature of the diffusion channel. One of the main solutions to this problem is to keep the symbol duration as long as possible and avoid all the molecules that may cause ISI in the next symbol duration. On the other hand, long symbol durations lead to very low data rates, even for very short distances. In this paper, a novel molecular communication scheme for diffusion-based communication channels is proposed in order to increase the data rate. The proposed technique employs multiple molecule types simultaneously to reduce the ISI and achieve a better symbol error rate compared to that of the standard modulation technique.