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Fast antenna selection algorithms for MIMO systems

Författare:
Publiceringsår: 2003
Språk: Engelska
Sidor: 1733-1737
Publikation/Tidskrift/Serie: IEEE 58th Vehicular Technology Conference, 2003. VTC 2003-Fall.
Volym: 3
Dokumenttyp: Konferensbidrag

Sammanfattning

We consider the capacity of multiple-input-multiple-output (MIMO) systems with reduced complexity. One link end uses all available antennas, while the other chooses the "best" L out of N antennas. The selection of the optimum antenna subset requires an exhaustive search of all possible combinations, involving (/sub L//sup N/) computations of determinants of size L /spl times/ L, which can become prohibitively complex. In this paper, we suggest a class of fast antenna selection algorithm that are based on the correlation or mutual information between the signals at the different antenna elements. It requires less than N/sup 2/ vector multiplications and thus leads to dramatic savings on the computation time. Its performance is very close to the optimum selection procedure: the capacity penalty is less than l bit/s/Hz for the analyzed examples. The algorithm thus offers the possibility of almost-optimum selection even in fast-changing environments.

Nyckelord

  • Electrical Engineering, Electronic Engineering, Information Engineering
  • correlation methods
  • antenna arrays
  • antenna accessories
  • MIMO systems

Övriga

IEEE Vehicular Technology Conference. VTC Fall, 2003
Published
  • ISSN: 1090-3038
  • ISBN: 0-7803-7954-3

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