TR2003-136

Keyhole Effects in MIMO Wireless Channels - Measurements and Theory


    •  Almers, P., Tufvesson, F., Molisch, A.F., "Keyhole Effects in MIMO Wireless Channels - Measurements and Theory", IEEE Global Telecommunications Conference (GLOBECOM), December 2003, vol. 4, pp. 1781-1785.
      BibTeX TR2003-136 PDF
      • @inproceedings{Almers2003dec,
      • author = {Almers, P. and Tufvesson, F. and Molisch, A.F.},
      • title = {Keyhole Effects in MIMO Wireless Channels - Measurements and Theory},
      • booktitle = {IEEE Global Telecommunications Conference (GLOBECOM)},
      • year = 2003,
      • volume = 4,
      • pages = {1781--1785},
      • month = dec,
      • url = {https://www.merl.com/publications/TR2003-136}
      • }
  • Research Area:

    Communications

Abstract:

It has been predicted theoretically that for some environments, the capacity of wireless MIMO 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. We analyze limitations for measurement-based capacity calculations and keyhole investigations. We further present error bounds for the capacity and eigenvalue distributions due to measurement imperfections such as finite signal-to-noise ratio and multipath leakage. The bounds are compared to the measurement results and show excellent agreement. Finally, we analyze the envelope distribution and, as expected from theory, if follows a double Rayleigh.

 

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  • Related Publication

  •  Almers, P., Tufvesson, F., Molisch, A.F., "Keyhole Effects in MIMO Wireless Channels - Measurements and Theory", IEEE Transactions on Wireless Communications, Vol. 5, No. 12, pp. 3596-3604, December 2006.
    BibTeX IEEE Xplore
    • @article{Almers2006dec,
    • author = {Almers, P. and Tufvesson, F. and Molisch, A.F.},
    • title = {Keyhole Effects in MIMO Wireless Channels - Measurements and Theory},
    • journal = {IEEE Transactions on Wireless Communications},
    • year = 2006,
    • volume = 5,
    • number = 12,
    • pages = {3596--3604},
    • month = dec,
    • issn = {1536-1276},
    • url = {https://ieeexplore.ieee.org/document/4027594}
    • }