%0 Conference Paper %B Proceedings of the IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM'14) %D 2014 %T Experimental Testbed for 5G Cognitive Radio Access in 4G LTE Cellular Systems %A Martin Danneberg %A Rohit Datta %A Andreas Festag %A Gerhard Fettweis %C A Coruna, Spain %8 06/2014