A Real-Time Wideband Subband LMS Algorithm for Full-Duplex Communications

• Published in: IEEE access Vol. 10; pp. 32566 - 32573
• Main Authors: Lorenz, Kevin S., Goodman, Joel, Mcbeth, Michelle, Mckeon, Matthew B., Parrett, David J.
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Adaptive filters; Algorithms; Broadband; Clocks; Computer architecture; Digital signal processing; Field programmable gate arrays; Full-duplex system; Hardware; least mean square methods; Microprocessors; radio communication; radio transceivers; Real time; Real-time systems; Signal processing algorithms
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2022.3161548

In-band full-duplex (IBFD) communications has the potential to nearly double the spectrum efficiency of existing 5G communications. Digital signal processing to mitigate self-interference is one way to realize this full-duplex capability. However, the aggregated wideband nature of 5G coupled with the potential for large delay spreads and short coherence times makes the realistic implementation of such an IBFD processor challenging. In this paper, we address the architectural considerations and describe the practical implementation of a real-time IBFD digital processor and its performance when operating on wideband data collected in a highly dynamic environment.