Adaptive Molecule Transmission Rate for Diffusion Based Molecular Communication

TL;DR

This paper introduces a simple, memory-limited molecular transmitter that adaptively adjusts diffusion rates to reduce interference, achieving near-optimal error performance with minimal complexity.

Contribution

It proposes a novel adaptive transmission scheme for molecular communication that leverages memory to mitigate ISI and simplifies system design.

Findings

Error probability close to the theoretical lower bound

Performance improvement over non-adaptive schemes

System simplicity with a single molecule type

Abstract

In this paper, a simple memory limited transmitter for molecular communication is proposed, in which information is encoded in the diffusion rate of the molecules. Taking advantage of memory, the proposed transmitter reduces the ISI problem by properly adjusting its diffusion rate. The error probability of the proposed scheme is derived and the result is compared with the lower bound on error probability of the optimum transmitter. It is shown that the performance of introduced transmitter is near optimal (under certain simplifications). Simplicity is the key feature of the presented communication system: the transmitter follows a simple rule, the receiver is a simple threshold decoder and only one type of molecule is used to convey the information.