NDLI: A time-domain propagation model of the UWB indoor channel in the FCC-compliant band 3.6 - 6 GHz based on PN-sequence channel measurements

Content Provider	IEEE Xplore Digital Library
Author	Cassioli, D. Durantini, A.
Copyright Year	2004
Description	Author affiliation: RADIOLABS - Electron. Eng. Dept., Univ. of Rome Tor Vergata, Italy (Cassioli, D.; Durantini, A.)
Abstract	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 for LOS and NLOS conditions by distance power laws and the shadowing by log-normal distributions. The average power-delay profiles exhibit a clustered structure, which means that rays arrive at the receiver in groups, each having a given decay constant. We characterize the small-scale statistics by selecting the distribution that verifies with a 95%-confidence interval both the chi-square test and the Kolmogorov-Smirnov test applied to the experimental data. The gamma distribution verifies the abovementioned tests in most cases. The shape parameters of such gamma distributions spread in the range of 1 /spl divide/ 3, and remain roughly constant around 2 with the excess delay.
Starting Page	213
Ending Page	217
File Size	416256
Page Count	5
File Format	PDF
ISBN	0780382552
ISSN	15502252
DOI	10.1109/VETECS.2004.1387945
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-05-17
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Time domain analysis Testing Antenna measurements Pulse modulation Floors Receiving antennas Measurement techniques Pulse measurements Pulse shaping methods Probes
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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