Multi-Frequency Resonant Circuit Based Multi-User Emergency Through-the-Earth Communication with Magnetic Induction

TL;DR

This paper introduces a multi-frequency resonant circuit approach for multi-user magnetic induction through-the-earth communication, effectively reducing interference and improving transmission performance in emergency scenarios.

Contribution

The paper proposes a novel multi-frequency resonant circuit design that enables multi-user MI communication with natural interference mitigation, advancing practical emergency communication systems.

Findings

Numerical results confirm theoretical analysis.

Multi-frequency approach reduces user interference.

System significantly enhances communication performance.

Abstract

Magnetic induction (MI) is an effective technique in emergency through-the-earth communications due to the higher penetration efficiency and lower propagation loss as compared with electromagnetic wave communication. How to cancel the interference between different users and enhance the effectiveness of multi-user transmissions is imperative for the practical application of MI communication. In this paper, we use multi-frequency resonant circuit to establish multiple resonant frequencies for MI communication. The transmissions corresponding to different users operate at different resonant frequencies and multi-user interferences can be naturally mitigated. Numerical results verify our theoretical analyses and show that the proposed system can significantly enhance the performance.