Date Added: Nov 2011
The proliferation of PCS has necessitated the complete characterization of radio channels existing inside buildings. The indoor radio channel differs from the conventional mobile radio channel in two aspects. First of all the distances taken in account are a lot small, and then the inconsistency of the environment are much larger for a smaller range of distance between transmitter and receiver. Indoor use of wireless systems poses one of the major design challenges, as indoor Radio Frequency (RF) propagation is essentially a complex phenomenon. In this paper, the authors will try to emphasis on this odd subject and will try to compute and place boundaries for use of wireless systems within buildings at 900MHz.