Full-duplex beyond self-interference: the unlimited sensing way
File(s)
Accepted version
Author(s)
Liu, Ziang
Bhandari, Ayush
Clerckx, Bruno
Type
Journal Article
Abstract
The success of full-stack full-duplex communication systems depends on how effectively one can achieve digital self-interference cancellation (SIC). Towards this end, in this letter, we consider unlimited sensing framework (USF) enabled full-duplex system. We show that by injecting folding non-linearities in the sensing pipeline, one can not only suppress self-interference but also recover the signal of interest (SoI). This approach leads to novel design of the receiver architecture that is complemented by a modulo-domain channel estimation method. We then demonstrate the advantages of Mλ -ADC by analyzing the relationship between quantization noise, quantization bits, and dynamic range. Numerical experiments show that the USF enabled receiver structure can achieve up to 40 dB digital SIC by using as few as 4-bits per sample. Our method outperforms the previous approach based on adaptive filters when it comes to digital SIC performance, SoI reconstruction, and detection.
Date Issued
2025-01-01
Date Acceptance
2024-11-19
Citation
IEEE Communications Letters, 2025, 29 (1), pp.165-169
ISSN
1089-7798
Publisher
Institute of Electrical and Electronics Engineers
Start Page
165
End Page
169
Journal / Book Title
IEEE Communications Letters
Volume
29
Issue
1
Copyright Statement
Copyright © 2024 IEEE. This is the author’s accepted manuscript made available under a CC-BY licence in accordance with Imperial’s Research Publications Open Access policy (www.imperial.ac.uk/oa-policy)
License URL
Publication Status
Published
Date Publish Online
2024-11-22