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Precoded closed-loop MIMO-OFDM system using predefined set of rotation matrices

Precoded closed-loop MIMO-OFDM system using predefined set of rotation matrices

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Multiple-input multiple-output (MIMO) wireless systems obtain large diversity and capacity gains by employing multiple antennas at both the transmitter and receiver side. Proposed is a simple precoded closed-loop MIMO-OFDM system that improves the bit error performance. The proposed scheme only needs a feedback of two bits per OFDM tone for the entire duration of a frame.

References

    1. 1)
      • I.E. Telatar . Capacity of multi-antenna channels. Eur. Trans. Telecommun. , 585 - 595
    2. 2)
    3. 3)
      • Love, D.J., Heath, R.W.: `Quantized antenna weighting for multiple-input multiple-output wireless systems', Proc. Allerton Conf. on Communication Control and Components, October 2002.
    4. 4)
      • Mukkavilli, K.K., Sabharwal, A., Aazhang, B.: `Design of multiple antenna coding schemes with channel feedback', Proc. Annual Asil. Conf. on Signal Systems and Components, November 2001.
    5. 5)
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