Literature Survey - Final

Space-time coding is a powerful way to leverage spatial diversity gain and improve reliability in multiple input multiple output (MIMO) communication systems. In this paper, we examine a semi-blind adaptive time-domain equalization (TEQ) strategy in conjunction with Alamouti space-time coding to achieve channel shortening. Channel shortening is necessary when the channel response is longer than the cyclic prefix (CP) in a multi-carrier modulation scheme, which precludes low complexity equalization in the frequency domain. Although several TEQ schemes for MIMO systems exist, there has been limited research in leveraging Alamouti spacetime coding to enhance channel shortening capabilities. We propose a cascaded receiver design, which first performs channel shortening with a blind algorithm developed by Martin et al. in [1]. The receiver then decodes the Alamouti code using a semi-blind channel estimation technique [2], and uses the resulting channel estimate to perform frequency domain equalization.