Space-Time-Blockcodes (STBC), that have been introduced by Alamouti [1] and Tarokh et.al. [2], are now considered in the current 3GPP standard as one method to achieve spatial diversity. While the performance of space-time blockcodes has been subject of extensive research [3, 4, 2], the impact of channel estimation errors and closed loop power control on the performance of of STBC remain open f...