A Unifying Model for External Noise Sources and ISI in Diffusive Molecular Communication

Abstract

This paper considers the impact of external noise sources, including interfering transmitters, on a diffusive molecular communication system, where the impact is measured as the number of noise molecules expected to be observed at a passive receiver. A unifying model for noise, multiuser interference, and intersymbol interference is presented, where, under certain circumstances, interference can be approximated as a noise source that is emitting continuously. The model includes the presence of advection and molecule degradation. The time-varying and asymptotic impact is derived for a series of special cases, some of which facilitate closed-form solutions. Simulation results show the accuracy of the expressions derived for the impact of a continuously-emitting noise source, and show how approximating intersymbol interference as a noise source can simplify the calculation of the expected bit error probability of a weighted sum detector.

14 pages, 7 figures, 4 tables, 1 appendix. To appear in IEEE Journal on Selected Areas in Communications (JSAC). Submitted October 21, 2013, revised April 21, 2014, accepted June 3, 2014

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Cited by in corpus (6)

• Optimal Receiver Design for Diffusive Molecular Communication With Flow and Additive Noise
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• Channel Estimation for Diffusive Molecular Communications
• Analysis and Design of Multi-Hop Diffusion-Based Molecular Communication Networks
• Channel Estimation for Diffusive MIMO Molecular Communications
• Channel Estimation Techniques for Diffusion-Based Molecular Communications