Dear Romario,
the link level simulator relies on the communications toolbox to generate pseudo-noise sequences (see http://de.mathworks.com/help/comm/ref/commsrc.pn.html).
See https://www.nt.tuwien.ac.at/research/mobile-communications/vienna-lte-a-simulators/lte-advanced-link-level-simulator/ for a list of software requirements.
Regards,
Stefan.