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http://dx.doi.org/10.3837/tiis.2022.04.015

Optimizations for Mobile MIMO Relay Molecular Communication via Diffusion with Network Coding  

Cheng, Zhen (School of Computer Science and Technology, Zhejiang University of Technology)
Sun, Jie (School of Computer Science and Technology, Zhejiang University of Technology)
Yan, Jun (School of Computer Science and Technology, Zhejiang University of Technology)
Tu, Yuchun (School of Computer Science and Technology, Zhejiang University of Technology)
Publication Information
KSII Transactions on Internet and Information Systems (TIIS) / v.16, no.4, 2022 , pp. 1373-1391 More about this Journal
Abstract
We investigate mobile multiple-input multiple-output (MIMO) molecular communication via diffusion (MCvD) system which is consisted of two source nodes, two destination nodes and one relay node in the mobile three-dimensional channel. First, the combinations of decode-and-forward (DF) relaying protocol and network coding (NC) scheme are implemented at relay node. The adaptive thresholds at relay node and destination nodes can be obtained by maximum a posteriori (MAP) probability detection method. Then the mathematical expressions of the average bit error probability (BEP) of this mobile MIMO MCvD system based on DF and NC scheme are derived. Furthermore, in order to minimize the average BEP, we establish the optimization problem with optimization variables which include the ratio of the number of emitted molecules at two source nodes and the initial position of relay node. We put forward an iterative scheme based on block coordinate descent algorithm which can be used to solve the optimization problem and get optimal values of the optimization variables simultaneously. Finally, the numerical results reveal that the proposed iterative method has good convergence behavior. The average BEP performance of this system can be improved by performing the joint optimizations.
Keywords
Molecular communication via diffusion; Mobile; MIMO; Optimizations; Network coding;
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