Experimental investigation of cooperative schemes on a real-time DSP-based testbed

  • Authors:
  • Per Zetterberg;Christos Mavrokefalidis;Aris S. Lalos;Emmanouil Matigakis

  • Affiliations:
  • ACCESS Linnaeus Center, Royal Institute of Technology, Stockholm, Sweden;Research Academic Computer Technology Institute, Patras University, Patras, Greece;Research Academic Computer Technology Institute, Patras University, Patras, Greece;Department of Electronic and Computer Engineering, Technical University of Crete, Chania, Crete, Greece

  • Venue:
  • EURASIP Journal on Wireless Communications and Networking - Special issue on cooperative communications in wireless networks
  • Year:
  • 2009

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Abstract

Experimental results on the well-known cooperating relaying schemes, amplify-and-forward (AF), detect-and-forward (DF), cooperative maximum ratio combining (CMRC), and distributed space-time coding (DSTC), are presented in this paper. A novel relaying scheme named "selection relaying" (SR), in which one of two relays are selected base on path-loss, is also tested. For all schemes except AF receive antenna diversity is as an option which can be switched on or off. For DF and DSTC a feature "selective" where the relay only forwards frames with a receive SNR above 6 dB is introduced. In our measurements, all cooperative relaying schemes above increase the coverage area as compared with direct transmission. The features "antenna diversity" and "selective" improve the performance. Good performance is obtained with CMRC, DSTC, and SR.