Space-frequency block code with matched rotation for MIMO-OFDM system with limited feedback

  • Authors:

  • Min Zhang;Thushara D. Abhayapala;Dhammika Jayalath;David Smith;Chandra Athaudage

  • Affiliations:

  • College of Engineering & Computer Science, Australian National University, Canberra, ACT, Australia;College of Engineering & Computer Science, Australian National University, Canberra, ACT, Australia;Faculty of Built Environment & Engineering, Queensland University of Technology, Brisbane, QLD, Australia;National ICT Australia Limited, Canberra, ACT, Australia;Department of Electrical & Electronic Engineering, University of Melbourne, Melbourne, VIC, Australia

  • Venue:
  • EURASIP Journal on Advances in Signal Processing - Multiuser MIMO Transmission with Limited Feedback, Cooperation, and Coordination
  • Year:
  • 2009

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Abstract

This paper presents a novel matched rotation precoding (MRP) scheme to design a rate one space-frequency block code (SFBC) and a multirate SFBC for MIMO-OFDM systems with limited feedback. The proposed rate one MRP and multirate MRP can always achieve full transmit diversity and optimal system performance for arbitrary number of antennas, subcarrier intervals, and subcarrier groupings, with limited channel knowledge required by the transmit antennas. The optimization process of the rate one MRP is simple and easily visualized so that the optimal rotation angle can be derived explicitly, or even intuitively for some cases. The multirate MRP has a complex optimization process, but it has a better spectral efficiency and provides a relatively smooth balance between system performance and transmission rate. Simulations show that the proposed SFBC with MRP can overcome the diversity loss for specific propagation scenarios, always improve the system performance, and demonstrate flexible performance with large performance gain. Therefore the proposed SFBCs with MRP demonstrate flexibility and feasibility so that it is more suitable for a practical MIMO-OFDM system with dynamic parameters.