@article{TUW-109560, author = {Baumgartner, Thomas and Bonek, Ernst}, title = {On the Optimum Number of Beams for Fixed Beam Smart Antennas in UMTS FDD}, journal = {IEEE Transactions on Wireless Communications}, year = {2006}, volume = {vol. 5}, number = {no. 3}, pages = {560--567}, url = {http://publik.tuwien.ac.at/files/pub-et_10436.pdf} }