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Keyhole effect in MIMO wireless Channels - Measurements and Theory

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Author

Summary, in English

It has been predicted theoretically that for some environments, the capacity of wireless multiple-input multiple-output systems can become very low even for uncorrelated signals; this effect has been termed "keyhole" or "pinhole". In this paper the first unique measurements of this effect are presented. The measurements were performed in a controlled indoor environment that was designed to obtain a keyhole channel. We analyze limitations due to measurement imperfections for measurement-based capacity calculations and keyhole investigations. We further present a bound for the higher eigenmodes as a function of the finite measurement signal-to-noise ratio and multipath component leakage. The bound is compared to the measurement results and shows excellent agreement. Finally, we analyze the envelope distribution and, as expected from theory, it follows a double-Rayleigh distribution

Publishing year

2006

Language

English

Pages

3596-3604

Publication/Series

IEEE Transactions on Wireless Communications

Volume

5

Issue

12

Document type

Journal article

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • measurements
  • pinhole
  • eigenvalue
  • double-Rayleigh
  • capacity
  • MIMO
  • keyhole

Status

Published

ISBN/ISSN/Other

  • ISSN: 1536-1276