Title :
Frequency Dependence of Fading Statistics for Ultrawideband Systems
Author :
Malik, Wasim Q. ; Edwards, David J. ; Stevens, Christopher
Author_Institution :
Dept. of Eng. Sci., Oxford Univ.
fDate :
3/1/2007 12:00:00 AM
Abstract :
The variation of channel fading and dispersion statistics between the ultrawideband (UWB) channel subbands is characterized experimentally. Within the FCC-allocated UWB frequency range (3.1-10.6 GHz), the multipath characteristics in various subbands are found to be highly dissimilar. It is demonstrated that the higher subbands suffer greater attenuation, and the rms delay spread varies significantly with the center frequency. The impact of this variation on multiband-OFDM UWB system performance is evaluated, and a large performance variation across the band is reported
Keywords :
OFDM modulation; fading channels; least mean squares methods; multipath channels; statistical analysis; ultra wideband communication; 3.1 to 10.6 GHz; FCC-allocated UWB frequency range; channel fading; dispersion statistics; fading statistics; frequency dependence; multiband-OFDM UWB system performance; multipath characteristics; rms delay spread; ultrawideband channel subbands; ultrawideband systems; Antenna measurements; Antennas and propagation; Attenuation; Delay; Fading; Frequency dependence; Frequency measurement; OFDM; Statistics; Ultra wideband technology;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2007.05490
