Optimum training sequences for OFDM systems with multiple transmit antennas

Abstract

Channel information is required for OFDM systems with multiple transmit and receive antennas exploiting antenna diversity. We present techniques to improve the performance and reduce the complexity of channel parameter estimation: optimum training sequence design and simplified channel estimation. The optimal training sequences not only simplify the initial channel estimation but also attain the best estimation performance. The simplified channel estimation significantly reduces the complexity of the channel estimation at the expense of a negligible performance degradation.