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In this paper, a beamforming scheme combined with quasi-orthogonal space-time block codes (QOSTBC) is proposed. At the transmitter, quasi-orthogonal space-time block coding signals is transmitted by using four independent transmit beams. As the receiver, a pairwise decoding algorithm is employed. A flat Rayleigh fading channel model is used in the simulations to compare performance of the proposed scheme with the traditional quasi-orthogonal space-time block codes approach where four independent transmit antennas are used.
Date of Conference: 24-26 Sept. 2009