@article {Trans_Wireless_Comm_2007, title = {Tight closed-form approximation for the ergodic capacity of orthogonal {STBC}}, journal = {IEEE Transactions on Wireless Communications}, volume = {6}, number = {2}, year = {2007}, month = {February}, pages = {452{\textendash}457}, author = {P{\'e}rez, Jes{\'u}s and Ib{\'a}{\~n}ez, Jes{\'u}s and Vielva, Luis and P{\'e}rez-Blanco, David J. and Santamar{\'\i}a, Ignacio} }