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In this paper, we investigate coded OFDM systems with linear constellation precoding and linear receivers. A prominent example of such systems is the DFT-Spread-OFDM uplink in the 3GPP LTE based cellular network. We adopt the diversity multiplexing tradeoff framework and show that, in the presence of an ideal outer code, precoding does not improve the diversity order obtained using the optimal decoder...
We consider the use of linear constellation precoding and linear detection in a multicarrier OFDM system with multiple receive antennas to obtain improved performance over multipath fading channels at a low complexity. We split the full set of subcarriers into smaller groups and spread the data symbols assigned to each group via precoding matrices. We adopt the diversity-multiplexing tradeoff (DMT)...
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