In-band full-duplex in hand-held applications: analysis of canceller tuning requirements

Leo Laughlin, Chunqing (Jack) Zhang, Mark Beach, Kevin Morris

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Abstract

This paper investigates the impact of user-antenna interaction on transmit-to-receive (Tx-Rx) isolation in a handheld In-band Full-duplex (IBFD) transceiver. Dynamic antenna measurements which capture the effect of user hand movements at 1900 MHz are incorporated into simulations of a two stage adaptive self-interference canceller, which simulates an electrical balance duplexer and a second stage of digital cancellation with different tracking adaptation rates. Results demonstrate that the dynamic self-interference channel which results from user movement places demanding requirements on the canceller coefficient tracking. Adaptation intervals of the order of tens ofmicroseconds are required to maintain Tx-Rx isolation of the order of 90 dB, calling into question the feasibility of IBFD handheld devices.
Original languageEnglish
Title of host publication2018 IEEE Wireless Advanced (WIAD 2018)
Subtitle of host publicationProceedings of a meeting held 26-28 June 2018, London, United Kingdom
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages41-45
Number of pages5
ISBN (Electronic)9781538654224
ISBN (Print)9781538654231
DOIs
Publication statusPublished - Feb 2019

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    Laughlin, L., Zhang, C. J., Beach, M., & Morris, K. (2019). In-band full-duplex in hand-held applications: analysis of canceller tuning requirements. In 2018 IEEE Wireless Advanced (WIAD 2018): Proceedings of a meeting held 26-28 June 2018, London, United Kingdom (pp. 41-45). [8588446] Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/WIAD.2018.8588446