Adaptive Cancellation of Nonlinear Self-Interference in Wireless Full-Duplex: Cascaded Spline-Interpolated Methods

Pablo Pascual Campo, Lauri Anttila, Dani Korpi, Mikko Valkama

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)
11 Downloads (Pure)


This article studies advanced digital self-interference (SI) cancellation algorithms for wireless full-duplex (FD) transceivers. While the majority of works in this area consider linear SI models and corresponding cancellation algorithms, we take also both the transmitter (TX) and receiver (RX) nonlinearities into account. Specifically, we develop a Hammerstein-Wiener type of digital SI cancellation system where the two involved nonlinearities are efficiently implemented through spline-interpolated look-up tables (LUTs). Also, adaptive parameter estimation solutions are pursued and discussed, and comprehensive cancellation performance examples and processing complexity comparisons are provided. The obtained results show that taking both the TX and RX nonlinearities into account in the digital cancellation stage can be beneficial, particularly when the TX power amplifier is operating close to saturation and when the RF isolation and RF cancellation prior to the RX low-noise amplifier (LNA) is limited, such that also the LNA is distorting the SI waveform.

Original languageEnglish
Title of host publicationConference Record of the 54th Asilomar Conference on Signals, Systems and Computers, ACSSC 2020
EditorsMichael B. Matthews
Number of pages7
ISBN (Electronic)9780738131269
ISBN (Print)9781665447072
Publication statusPublished - 2020
Publication typeA4 Article in conference proceedings
EventAsilomar Conference on Signals, Systems and Computers - Pacific Grove, United States
Duration: 1 Nov 20205 Nov 2020

Publication series

NameAsilomar Conference on Signals, Systems, and Computers proceedings
ISSN (Print)1058-6393
ISSN (Electronic)2576-2303


ConferenceAsilomar Conference on Signals, Systems and Computers
Country/TerritoryUnited States
CityPacific Grove


  • adaptive
  • cancellation
  • in-band full-duplex
  • look-up table
  • nonlinear distortion
  • Self-interference
  • spline interpolation

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications


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