Predictor antenna (PA) system is referred to as a system with two sets of antennas on the
roof of a vehicle, where the PAs positioned in the front of the vehicle are used to predict the
channel state observed by the receive antennas (RAs) that are aligned behind the PAs. In
this letter, we study the effect of spatial mismatch on the accuracy of channel state
information estimation, and analyze the delay-constrained average rate of hybrid automatic
repeat request (HARQ)-based PA systems. We consider variable-length incremental …