Signal Detection for Orthogonal Space-Time Block Coding over Correlated Time-Selective Fading Channels

A robust signal detector for orthogonal space-time block coding (OSTBC) over highly correlated time-selective fading channels is proposed. Several detectors for OSTBC have recently been proposed to achieve better performance over time-selective fading channels where channel estimation errors are inevitable. However, little has so far been reported on the robustness of OSTBC over highly correlated time-selective fading channels, which do exist in practice. A conventional detector for OSTBC is indeed weak in robustness against highly correlated time-selective fading channels. To address this issue, we propose a new decision-feedback detector. The proposed detector offers a strong robustness against highly correlated time-selective fading channels.