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Publication - Professor Mark Beach

    A 700-950 MHz Tunable Frequency Division Duplex Transceiver Combining Passive and Active Self-interference Cancellation

    Citation

    Laughlin, L, Zhang, C, Beach, MA, Morris, KA, Haine, JL & Khan, MK, 2018, ‘A 700-950 MHz Tunable Frequency Division Duplex Transceiver Combining Passive and Active Self-interference Cancellation’. in: 2018 IEEE MTT-S International Microwave Symposium (IMS 2018): Proceedings of a meeting held 10-15 June 2018, Philadelphia, Pennsylvania, USA. Institute of Electrical and Electronics Engineers (IEEE), pp. 1207-1210

    Abstract

    This paper presents a novel tunable FDD transceiver architecture which uses an electrical balance duplexer (EBD) to isolate Tx noise in the Rx band, and combines this with active self-interference cancellation to suppress the Tx blocker. This overcomes the limited isolation bandwidth of EBDs, shifting complexity from the RF domain to the digital baseband domain in order to provide isolation in both bands. A discrete hardware prototype has shown promising results and demonstrated the viability of this architecture, achieving 6.0-7.4 dB antenna referred noise figure in a 20 MHz downlink bandwidth, in the presence of a +27 dBm Tx blocker, across a range of duplex configurations in the 700-950 MHz range.

    Full details in the University publications repository