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2006
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Alamouti Space-Time Coded OFDM Systems in Time- and Frequency-Selective Channels

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Alamouti Space-Time Coded OFDM Systems in Time- and Frequency-Selective Channels
Abstract— We propose low-complexity equalizers for Alamouti space-time coded orthogonal frequency-division multiplexing (OFDM) systems in time- and frequency-selective channels, by extending the approach formerly proposed for single-antenna OFDM systems. The complexity of the proposed algorithm is linear in the number of subcarriers by exploiting the band structure of the frequency-domain channel matrix and a band LDLH factorization. We design minimum mean squared error (MMSE) block linear equalizers (BLE) and block decisionfeedback equalizers (BDFE) with and without windowing. We also develop a low-complexity algorithm that adaptively selects the useful bandwidth of the channel matrix. Simulation results show that the proposed algorithm produces a correct estimate of the bandwidth parameter.
Kun Fang, Geert Leus, Luca Rugini
Added 11 Jun 2010
Updated 11 Jun 2010
Type Conference
Year 2006
Where GLOBECOM
Authors Kun Fang, Geert Leus, Luca Rugini
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