Mobility

Space Time Processing With Adaptive STBC-OFDM Systems

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Executive Summary

In this paper, Optimum adaptive loading algorithms are applied to multicarrier system with Space-Time Block Coding (STBC) scheme associated with space-time processing based on Singular-Value Decomposition (SVD) of the channel matrix over Rayleigh fading channels. SVD method has been employed in MIMO-OFDM system in order to overcome subchannel interference. Chaw's and Compello's algorithms have been implemented to obtain a bit and power allocation for each subcarrier assuming instantaneous channel knowledge. The adaptive loaded SVD-STBC scheme is capable of providing both full-rate and full-diversity for any number of transmit antennas. The effectiveness of these techniques has been demonstrated through the simulation of an Adaptive loaded SVD-STBC system, and the comparison has shown that the proposed algorithms ensure better performance in the case of MIMO.

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