On Reliability of Underwater Magnetic Induction Communications with Tri-Axis Coils

Abstract

Underwater magnetic induction communications (UWMICs) provide a low-power and high-throughput solution for autonomous underwater vehicles (AUVs), which are envisioned to explore and monitor the underwater environment. UWMIC with tri-axis coils increases the reliability of the wireless channel by exploring the coil orientation diversity. However, the UWMIC channel is different from typical fading channels and the mutual inductance information (MII) is not always available. It is not clear the performance of the tri-axis coil MIMO without MII. Also, its performances with multiple users have not been investigated. In this paper, we analyze the reliability and multiplexing gain of UWMICs with tri-axis coils by using coil selection. We optimally select the transmit and receive coils to reduce the computation complexity and power consumption and explore the diversity for multiple users. We find that without using all the coils and MII, we can still achieve reliability. Also, the multiplexing gain of UWMIC without MII is 5dB smaller than typical terrestrial fading channels. The results of this paper provide a more power-efficient way to use UWMICs with tri-axis coils.

Performance Analysis of Near-Field Magnetic Induction Communication in Extreme Environments

“…Magnetic Induction (MI) communication is a reliable low-power solution for extreme environment wireless networking [4,7,11]. Thanks to its reliable wireless channel, it requires simple signal processing algorithms [6,8], which consume negligible power. Also, its low propagation loss in extreme environments demands small transmission power to successfully send data packets to a receiver.…”

Investigation of the Interference Background at the Input Of the Receiver of the Near-Field Magnetic Communication System in Urban Conditions

“…В отличии от ЭМ связи, в связи на основе МИ подобные эффекты возникают лишь при прохождении через ферромагнитные материалы. Большинство материалов, окружающих нас на планете, такие как почва [5,6], вода [7][8][9], строительные материалы, не обладают такими свойствами, имеют магнитную проницаемость, близкую к таковой у вакуума, тем самым обеспечивая беспрепятственное распространение магнитных волн [10,11].…”