Sh. Chen et Sk. Jeng, SBR IMAGE APPROACH FOR INDOOR RADIO PROPAGATION IN LARGE EMPTY BUILDINGS/, IEICE transactions on communications, E79B(9), 1996, pp. 1184-1191
In this paper we will propose a deterministic approach to model the ra
dio wave propagation channels in large empty buildings. This technique
applies the modified SBR method to find equivalent sources (images) i
n each launched triangular ray tube, and sums the receiving amplitude
contributed by all images coherently. In addition, vector effective an
tenna height (VEH) is introduced to consider the polarization coupling
effect resulting from the multiple reflection inside the buildings. W
e verify this approach by comparing the numerical results in three can
onical examples where closed-form solutions exist. The good agreement
indicates that our method can provide a good approximation of high fre
quency radio propagation inside buildings where multiple reflection is
dominant. Work reported in this paper has shown that propagation loss
in large empty buildings can vary considerably according to the geome
trical configurations of buildings and polarizations. This SBR/image m
ethod can be enhanced by including the wall penetration and wedge diff
raction effects so that more complicated indoor environments with furn
iture will be handled. Additional considerations, such as buildings cr
owded with pedestrians are left for future studies.