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We derive a statistical model of the UWB indoor channel based on the experimental data collected in a modern office building. Measurements were made in different rooms throughout the floor and within each room the receiver antenna was moved over a square grid of 25 /spl times/ 25 locations spaced 2 cm apart. The measurement technique was based on the use of a carrier at 4.78 GHz modulated by a train of short duration (0.4 ns) pulses shaped by a PN-sequence. Thus the probe signal covers the band 3.6 - 6 GHz. We coherently demodulate the received signals and cross-correlate their in-phase and q-phase components to an opportune PN-sequence template to extract the channel impulse responses from the recorded profiles. Then we post-process these "recovered" impulse responses by best-fit procedures to set up a statistical tapped delay line model of the UWB indoor channel. We model the path loss …