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Publication - Professor Mark Beach

    In-band full-duplex in hand-held applications

    analysis of canceller tuning requirements


    Laughlin, L, Zhang, C(, 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. Institute of Electrical and Electronics Engineers (IEEE), pp. 41-45


    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.

    Full details in the University publications repository