Full- or half-duplex? A capacity analysis with bounded radio resources

Vaneet Aggarwal, Melissa Duarte, Ashutosh Sabharwal, N. K. Shankaranarayanan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

43 Scopus citations

Abstract

Full duplex communication requires nodes to cancel their own signal which appears as an interference at their receive antennas. Recent work has experimentally demonstrated the feasibility of full duplex communications using software radios. In this paper, we address capacity comparisons when the total amount of analog radio hardware is bounded. Under this constraint, it is not immediately clear if one should use these radios to perform full-duplex self-interference cancellation or use the radios to give additional MIMO multiplexing advantage. We find that repurposing radios for cancellation, instead of using all of them for half-duplex over-the-air transmission, can be beneficial since the resulting full-duplex system performs better in some practical SNR regimes and almost always outperforms half duplex in symmetric degrees-of-freedom (large SNR regime).

Original languageEnglish (US)
Title of host publication2012 IEEE Information Theory Workshop, ITW 2012
Pages207-211
Number of pages5
DOIs
StatePublished - 2012
Event2012 IEEE Information Theory Workshop, ITW 2012 - Lausanne, Switzerland
Duration: Sep 3 2012Sep 7 2012

Publication series

Name2012 IEEE Information Theory Workshop, ITW 2012

Conference

Conference2012 IEEE Information Theory Workshop, ITW 2012
Country/TerritorySwitzerland
CityLausanne
Period9/3/129/7/12

ASJC Scopus subject areas

  • Information Systems

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