Measurements and modelling of RMS delay spread (RDS) in indoor line-of
-sight (LOS) conditions at HIPERLAN/U-NII frequencies (5.2GHz) with om
ni-directional antennas show that the maximum RDS in a room is depende
nt on the dimensions of the room and the reflection coefficient of the
walls, Furthermore, in a given room, RDS increases with distance from
the transmitter up to a maximum value and plateaus at this maximum ov
er a large part of the room.