802.11 with multiple antennas for dummies

  • Authors:
  • Daniel Halperin;Wenjun Hu;Anmol Sheth;David Wetherall

  • Affiliations:
  • University of Washington, Seattle, WA, USA;University of Washington, Seattle, WA, USA;Intel Labs Seattle, Seattle, WA, USA;University of Washington, Seattle, WA, USA

  • Venue:
  • ACM SIGCOMM Computer Communication Review
  • Year:
  • 2010

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Abstract

The use of multiple antennas and MIMO techniques based on them is the key feature of 802.11n equipment that sets it apart from earlier 802.11a/g equipment. It is responsible for superior performance, reliability and range. In this tutorial, we provide a brief introduction to multiple antenna techniques. We describe the two main classes of those techniques, spatial diversity and spatial multiplexing. To ground our discussion, we explain how they work in 802.11n NICs in practice.