13GPP. RF system scenarios ,TR25.942 v.4.0.0-2002.
2TR 101 112 V3.1.0, UMTS30.03 version 3.1.0-1997 . Universal mobile telecommunications system (UMTS) :selection procedures for the choice of radio transmission technologies of the UMTS.
3Maciel L R , Bertoni H L,Xia H H . Unified approach to prediction of propagation over buildings for all ranges of base station antenna height .IEEE Trans Veh Technol, 1993,42(2) :41-45.