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Treating Self-Interference as Source: An ICA Assisted Full-Duplex Relay System

Duan, H; Jiang, Y; Zhu, X; Wei, Z; Liu, Y; Gao, L; (2019) Treating Self-Interference as Source: An ICA Assisted Full-Duplex Relay System. In: 2019 IEEE Wireless Communications and Networking Conference (WCNC). IEEE: Marrakesh, Morocco. Green open access

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Abstract

We investigate an amplify-and-forward (AF) full-duplex (FD) relay system, where the FD incurred self-interference (SI), through partial cancelation at relay, is treated as a useful source at destination to enhance degree of freedom in signal detection, while reducing the signal processing cost of SI cancelation. An independent component analysis (ICA) based equalization structure is employed at destination to separate and detect the desired signal from the residual SI in a semi-blind way. The mode of SI cancelation at relay is chosen adaptively based on the threshold of signal-to-interference ratio (SIR) at relay. The proposed FD relay system not only features reduced signal processing cost of SI cancelation, but also achieves much higher energy efficiency (EE) than conventional FD relay systems where SI is canceled as much as possible. Also, the proposed system enables full resource utilization via consecutive data transmission at all time and the same frequency, leading to much higher throughput and EE than the conventional time-splitting and power-splitting based SI recycling approaches that occupy partial resources. Last but not least, the proposed system demonstrates a bit error rate (BER) performance that is robust against a wide range of SI and close to the ideal case with perfect channel state information (CSI) and perfect SI cancelation, while requiring no training sequence for estimation of any channel involved.

Type: Proceedings paper
Title: Treating Self-Interference as Source: An ICA Assisted Full-Duplex Relay System
Event: WCNC 2019
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/WCNC.2019.8885786
Publisher version: https://doi.org/10.1109/WCNC.2019.8885786
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Relays , Receiving antennas , Transmitting antennas , OFDM , Bit error rate , Channel estimation , Conferences
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10089001
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