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An Adaptive MIMO-OFDMA Relay System

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3 Author(s)
Daniel Munoz ; Department of Electrical Engineering, The University of Texas at Dallas ; Baile Xie ; Hlaing Minn

We consider multi-input multi-output (MIMO) antennas relay systems under time-varying channels and propose a joint relay, antenna, subband, and MIMO transmission mode adaptation scheme which enables antenna selection to exploit channel state information (CSI) at the beginning of transmission and switch to space-frequency block coding (SFBC) when CSI becomes outdated. Moreover, we propose temporal power and bit loading for the cascaded source-relay-destination link with/without inter-hop power allocation to further enhance the system performance.

Published in:

IEEE Wireless Communications Letters  (Volume:1 ,  Issue: 5 )