Joint Equalization and Self-Interference Cancellation for Underwater Acoustic In-Band Full-Duplex Communication
Date
2024-01-11
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE Journal of Oceanic Engineering
Abstract
In-band full-duplex (IBFD) communication in underwater acoustic channels is challenged by strong and time-varying self-interference (SI). To detect data symbols, the receiver needs to suppress the SI and equalize the resultant signal to compensate for the intersymbol interference (ISI) caused by the remote transmission (RT) channel. In this article, we develop a new receiver that combines adaptive decision feedback equalizer and SI cancellation (ADFE-SIC) to jointly eliminate the ISI and SI. A recursive least squares algorithm adaptively estimates the filters in ADFE-SIC. By conducting simulations and experimental tests, we show that the proposed method outperforms the conventional approach in which equalization and SI cancellation tasks are performed separately and the filter configuration is based on prior estimations of the SI and the RT channels.
Description
© 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. This article was originally published in IEEE Journal of Oceanic Engineering. The version of record is available at: https://doi.org/10.1109/JOE.2023.3332237. This article will be embargoed until 01/11/2026.
Keywords
adaptive filtering, bandwidth efficiency, decision feedback equalizer, in-band full-duplex (IBFD), time-varying channels, underwater acoustic communication
Citation
M. Towliat, Z. Guo, L. J. Cimini, X. -G. Xia and A. Song, "Joint Equalization and Self-Interference Cancellation for Underwater Acoustic In-Band Full-Duplex Communication," in IEEE Journal of Oceanic Engineering, doi: 10.1109/JOE.2023.3332237.