Study on MIMO Techniques in Diffusion-Based Molecular Communications
Date Issued
2015
Date
2015
Author(s)
Chen, Shin-Rung
Abstract
In molecular communications nanomachines are the transceivers and molecules are message carrier for communication between nanomachines. Different from conventional communications, the scenario of molecular communication is mostly discussed and applied in human body with short communication range over which molecules drift. The channel is generally modeled as a diffusion one based on Brownian motion. The receiver detects molecules within a symbol duration for determining carried messages. In diffusion-based molecular communications, intersymbol interference arises from the fact that molecules emitted in the previous symbol duration may arrive at the receiver in current symbol time, causing interference to current symbol detection. To cope with the issue and improve system performance, we propose space-time modulation techniques and a weighted combining approach for MIMO transmissions and reception, respectively. We further discuss the impact of transmission range, symbol duration, and diffusion coefficient on system performance. Finally we address difference between molecular communication and conventional communication.
Subjects
Nanonetwork
Molecular communication
MIMO
Intersymbol Interference
Diffusion,
Brownian motion
Type
thesis
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