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In this paper we propose an improved multiple-input multiple-output (MIMO) polynomial cancellation coding (PCC) orthogonal frequency division multiplexing (OFDM) system. In this improved system, PCC OFDM symbols are transmitted from different antennae with different time offsets. At the receiver these symbols are demodulated using each of those time offsets. Time offsets substantially reduce the power...
A novel combination of block spread orthogonal frequency division multiple access (BS-OFDMA) with space-time coded multiple input multiple output (STC MIMO) scheme is proposed for broadband wireless access uplink transmission. Using complex exponential spreading sequences, the block spreading technique can efficiently generate precoded OFDMA signal to exploit frequency diversity. An Alamouti STC MIMO...
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