UWB Channel Modeling Based on Wideband Indoor Channel Measurements at 2.4, 4.75, and 11.5 GHz

Using the wideband indoor channel measurements data at 2.4, 4.75 and 11.5 GHz of [1], a statistical Ultra Wide Band (UWB) channel model is determined. Employing different windows (i.e. Rectangular, Hanning and Blackman-Harris), the impulse response model for the UWB channel is obtained and accordingly, major channel parameters such as path loss exponent, shadowing, root mean square (rms) delay spread and number of multipath components are investigated. The path loss depends on the window type used. The path loss exponent is found to be lower than the free space attenuation for LOS at the three frequencies. For OBS, the path loss exponent increases with the frequency. The standard deviation of the shadow fading is much larger for OBS than for LOS. The RDS depends on the distance and is found to be about 9-11 ns and 18-21 ns for LOS and OBS, respectively. Keywordschannel measurements, UWB, windowing, multipath, path loss, shadowing, rms delay spread.