An in-band full-duplex radio receiver with a passive vector modulator downmixer for self-interference cancellation

Dirk-Jan van den Broek, Eric A.M. Klumperink, Bram Nauta

    Research output: Contribution to journalArticleAcademicpeer-review

    41 Citations (Scopus)
    88 Downloads (Pure)

    Abstract

    In-band full-duplex (FD) wireless, i.e., simultaneous transmission and reception at the same frequency, introduces strong self-interference (SI) that masks the signal to be received. This paper proposes a receiver in which a copy of the transmit signal is fed through a switched-resistor vector modulator (VM)that provides simultaneous downmixing, phase shift, and amplitude scaling and subtracts it in the analog baseband for up to 27 dB SI-cancellation. Cancelling before active baseband amplification avoids self-blocking, and highly linear mixers keep SIinduced distortion low, for a receiver SI-to-noise-and-distortionratio (SINDR) of up to 71.5 dB in 16.25 MHz BW. When combined with a two-port antenna with only 20 dB isolation, the low RX distortion theoretically allows sufficient digital cancellation for over 90 dB link budget, sufficient for short-range, low-power FD links.
    Original languageEnglish
    Pages (from-to)3003-3014
    Number of pages12
    JournalIEEE journal of solid-state circuits
    Volume50
    Issue number12
    DOIs
    Publication statusPublished - 1 Dec 2015

    Keywords

    • EWI-26695
    • METIS-315162
    • IR-99043

    Fingerprint Dive into the research topics of 'An in-band full-duplex radio receiver with a passive vector modulator downmixer for self-interference cancellation'. Together they form a unique fingerprint.

  • Cite this