Distributed closed-loop EO-STBC for a time-varying relay channel based on kalman tracking
Mohammed Nuri Ahmed Hussin Hussin, Mohamed Abubaker Alrmah, Stephan Weiss · Strathprints: The University of Strathclyde institutional repository (University of Strathclyde) · 2012
This paper considers distributed closed-loop extended orthogonal space-time block coding (EO-STBC) for amplify-forward relaying over time-varying channels. In between periodically injected pilot symbols for training, the smooth variation of the fading channel coefficients is exploited by Kalman tracking. We show in this paper that the joint variation of both relay channels still motivates the use of a higher-order auto-regressive model for the a priori prediction step within a decision-feedback system, compared to a first-order standard Kalman model. Simulations results compare these two case and highlight the benefits of the proposed higher-order Kalman filter, which offer joint decoding and tracking.