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

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

    Research output: Contribution to journalArticlepeer-review

    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.

    Original languageEnglish
    Article number231587
    JournalEurasip Journal on Advances in Signal Processing
    Volume2009
    DOIs
    Publication statusPublished - 2009

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