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Filter Design for Self-Interference Cancellation

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Full-Duplex Communications for Future Wireless Networks

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Abstract

Mitigation of self-interference is the prime challenge in making full-duplex technology feasible in wireless communications. In this chapter, we first present system model of a wireless communication link including a source, full-duplex transceiver, and destination, and discuss different approaches and assumptions when building the signal model. Then we will present frequency, time, and spatial signal processing techniques to mitigate self-interference in digital baseband. We concentrate on time-domain filtering instead of frequency-domain filtering on a subcarrier basis, because time-domain filtering need not assume OFDM waveforms or synchronization between transmitted and received signals. We complement the time-domain filtering with spatial filters that together are able to mitigate the effects of non-linear transmitter distortions using only linear operations.

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Acknowledgements

The author wants to thank Dr. Gustavo J. González for providing the full-duplex interference figure, Dr. Emilio Antonio Rodríguez for providing the simulation results of the adaptive filters, and Prof. Taneli Riihonen for the years spent with full-duplex research.

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Authors and Affiliations

  1. Aalto University School of Electrical Engineering, Espoo, Finland

    Risto Wichman

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  1. Risto Wichman
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Correspondence to Risto Wichman .

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Editors and Affiliations

  1. Centre for Wireless Communications, University of Oulu, Oulu, Finland

    Hirley Alves

  2. Unit of Electrical Engineering, Tampere University, Tampere, Finland

    Taneli Riihonen

  3. Department of Electrical and Electronic Engineering, University of Peradeniya, Peradeniya, Sri Lanka

    Himal A. Suraweera

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Wichman, R. (2020). Filter Design for Self-Interference Cancellation. In: Alves, H., Riihonen, T., Suraweera, H. (eds) Full-Duplex Communications for Future Wireless Networks. Springer, Singapore. https://doi.org/10.1007/978-981-15-2969-6_4

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  • DOI: https://doi.org/10.1007/978-981-15-2969-6_4

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  • Print ISBN: 978-981-15-2968-9

  • Online ISBN: 978-981-15-2969-6

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