Journal ArticleDOI
Performance Evaluation and Optimal Detection of Relay-Assisted Diffusion-Based Molecular Communication With Drift
TLDR
The numerical results show that with a constant molecular budget, DF relying strategy can considerably improve the system performance and an optimization problem that aims at minimizing the bit error probability is proposed.Abstract:
In this paper, we consider a decode-and-forward (DF) relay-assisted diffusion-based molecular communication system inside one of the blood vessels of a human body with positive drift from transmitter to receiver. We use the normal approximation to the distribution of the number of received molecules and derive a closed-form expression for the end-to-end bit error probability of the system. We then propose an optimization problem that aims at minimizing the bit error probability of the system and solve it at the receiver nanomachine by an algorithm based on the bisection method to determine the optimal detection threshold. Furthermore, we study the impact of the system parameters, such as drift velocity, position of the relay node and number of allocated molecules on the performance of the system. The numerical results show that with a constant molecular budget, DF relying strategy can considerably improve the system performance.read more
Citations
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Journal ArticleDOI
Estimate-and-Forward Relaying in Diffusion-Based Molecular Communication Networks: Performance Evaluation and Threshold Optimization
TL;DR: Numerical and simulation results show the improvement in molecular throughput when EF relaying scheme is employed in contrast to the baseline direct communication scheme, and systematic comparisons reveal the scenarios where EF scheme can be beneficial over the existing amplify- and-forward and decode-and-forward relaying schemes.
Journal ArticleDOI
Parameter Analysis in Macro-Scale Molecular Communications Using Advection-Diffusion
TL;DR: The bit duration has shown that the system reaches a saturation point as the bit duration is increased and this effect also occurs in the leftover chemical signal after bit transmission.
Journal ArticleDOI
Optimal Positioning of Relay Node in Cooperative Molecular Communication Networks
TL;DR: Numerical results show that the error performance can be improved by optimizing the position of the relay node, and an iterative algorithm based on the block coordinate descent algorithm is proposed and studied to solve this optimization problem.
Journal ArticleDOI
Optimal Transmitted Molecules and Decision Threshold for Drift-Induced Diffusive Molecular Channel With Mobile Nanomachines
TL;DR: To achieve minimum expected probability of error the optimum number of molecules to be transmitted from transmitter and optimal detection threshold in receiver nanomachine are found.
Journal ArticleDOI
On Flow-Induced Diffusive Mobile Molecular Communication: First Hitting Time and Performance Analysis
TL;DR: In this paper, the probability density function (PDF) of the first hitting time under various mobility conditions was derived, by characterizing the movement of the nanomachines and information molecules using Brownian motion with positive drift.
References
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