Experiment-driven characterization of full-duplex wireless systems

Melissa Duarte, Chris Dick, Ashutosh Sabharwal

Research output: Contribution to journalArticlepeer-review

1174 Scopus citations


We present an experiment-based characterization of passive suppression and active self-interference cancellation mechanisms in full-duplex wireless communication systems. In particular, we consider passive suppression due to antenna separation at the same node, and active cancellation in analog and/or digital domain. First, we show that the average amount of cancellation increases for active cancellation techniques as the received self-interference power increases. Our characterization of the average cancellation as a function of the self-interference power allows us to show that for a constant signal-to-interference ratio at the receiver antenna (before any active cancellation is applied), the rate of a full-duplex link increases as the self-interference power increases. Second, we show that applying digital cancellation after analog cancellation can sometimes increase the self-interference, and thus digital cancellation is more effective when applied selectively based on measured suppression values. Third, we complete our study of the impact of self-interference cancellation mechanisms by characterizing the probability distribution of the self-interference channel before and after cancellation.

Original languageEnglish (US)
Article number6353396
Pages (from-to)4296-4307
Number of pages12
JournalIEEE Transactions on Wireless Communications
Issue number12
StatePublished - 2012


  • Full-duplex radios

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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