Hybrid SI cancellation for single‐antenna full‐duplex radios. Issue 24 (1st November 2017)

• Record Type: Journal Article
• Authors: Quan, Xin; Pan, Wensheng; Li, Zhengjie; Liu, Ying; Tang, Youxi
• Is Part Of: Electronics letters. Volume 53:Issue 24(2017)
• Page Start: 1615
• Page End: 1617
• Publication Date: 2017-11-01
• Subjects: interference suppression -- radiofrequency interference -- radio transceivers -- radiofrequency power amplifiers -- HF antennas -- Long Term Evolution; hybrid SI cancellation scheme -- single‐antenna full‐duplex radio -- hybrid self‐interference cancellation scheme -- two‐tap analogue canceller mitigation -- digital multipath SI canceller -- auxiliary receiver chain -- RF‐transmitted signal -- residual multipath SI signal mitigation -- power amplifier -- phase noise suppresssion -- Long‐Term Evolution signal -- transceiver impairment -- frequency 20 MHz; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2017.1868
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A hybrid self‐interference (SI) cancellation scheme, composed of a two‐tap analogue canceller and a digital multi‐path SI canceller, is proposed for single‐antenna full‐duplex radios. The analogue canceller mitigates the two strongest components of the SI to prevent saturating the receiver. The digital canceller deploys an auxiliary receiver chain to capture the RF‐transmitted signal to mitigate the residual multi‐path SI signal. As the proposed scheme uses the RF‐transmitted signal as reference, the transceiver impairments such as power amplifier non‐linearities and phase noise are suppressed along with the SI. Experiments have validated the effectiveness of the proposed scheme on a 20 MHz long‐term evolution signal of +20 dBm power.