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The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In  facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
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Updated: Oct 7, 2025

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Low-Complexity Channel Codes for Reliable Molecular Communication via Diffusion.

Sofia Figueiredo1, Nuno Souto1,2, Francisco Cercas1,2

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Summary
This summary is machine-generated.

Tomlinson, Cercas, Hughes (TCH) codes enhance reliability in molecular communication (MC) systems by reducing interference and noise. These codes offer a promising solution for future in-body communication networks, improving data transmission without excessive complexity.

Keywords:
6GTCH codeschannel codingdiffusion-basedfuture wireless networksmolecular communications

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Area of Science:

  • Biomedical Engineering
  • Communication Systems
  • Information Theory

Background:

  • Future healthcare systems may integrate body-centric networks, leading to the "Internet of Bio-nano things".
  • Molecular Communications (MC) are a key technology for in-body data transmission.
  • Minimizing environmental noise and inter-symbol interference (ISI) is crucial for MC systems, especially those using diffusion.

Purpose of the Study:

  • To investigate the effectiveness of channel coding techniques in mitigating noise and ISI in MC systems.
  • To evaluate Tomlinson, Cercas, Hughes (TCH) codes as a novel approach for MC environments.
  • To demonstrate the practical application and benefits of TCH codes in a real-world MC scenario.

Main Methods:

  • Simulation of various channel codes within MC system models.
  • Analysis of TCH codes, focusing on their codeword properties for simplified detection.
  • Development and testing of a macroscale experimental test bed using pH as an information carrier.

Main Results:

  • TCH codes demonstrate superior performance in MC scenarios compared to existing alternatives.
  • The proposed TCH codes effectively reduce inter-symbol interference and environmental noise.
  • The experimental test bed confirmed that TCH codes significantly improve communication reliability.

Conclusions:

  • TCH codes present a highly effective and efficient solution for enhancing reliability in molecular communication systems.
  • The simplified detection offered by TCH codewords makes them particularly suitable for MC applications.
  • This research paves the way for more robust and dependable in-body communication networks.