Molecular Communications with Longitudinal Carrier Waves: Baseband to Passband Modulation

TL;DR

This paper introduces passband modulation in molecular communications using longitudinal carrier waves generated by transmitter oscillation, enabling frequency division multiplexing to increase channel capacity.

Contribution

It presents a novel passband modulation technique with longitudinal carrier waves and demonstrates frequency division multiplexing in molecular communication systems.

Findings

Successful implementation of passband modulation with longitudinal waves

Demonstration of frequency division multiplexing in molecular channels

Enhanced bandwidth utilization in molecular communications

Abstract

Traditional molecular communications via diffusion (MCvD) systems have used baseband modulation techniques by varying properties of molecular pulses such as the amplitude, the frequency of the transversal wave of the pulse, and the time delay between subsequent pulses. In this letter, we propose and implement passband modulation with molecules that exhibit longitudinal carrier wave properties. This is achieved through the oscillation of the transmitter. Frequency division multiplexing is employed to allow different molecular information streams to co-exist in the same space and time channel, creating an effective bandwidth for MCvD.