@conference {letzepis2008outageppm, title = {Outage probability of the MIMO gaussian free space optical channel with PPM}, booktitle = {Proceedings of the IEEE International Symposium on Information Theory, ISIT{\textquoteright} 08}, year = {2008}, note = {Event type = conference}, month = {Aug}, pages = {2649{\textendash}2653}, publisher = {IEEE}, organization = {IEEE}, address = {Toronto, Canada}, isbn = {9781424422562}, doi = {10.1109/ISIT.2008.4595472}, url = {http://www.isit2008.org/}, author = {Nick Letzepis and Guill{\'e}n i F{\`a}bregas, Albert} }