Title page for ETD etd-050499-150855

Type of Document

Master's Thesis

Author

Patwari, Neal

Author's Email Address

neal@vt.edu

URN

etd-050499-150855

Title

Measured and Modeled Time and Angle Dispersion Characteristics of the 1.8 GHz Peer-to-Peer Radio Channel

Degree

Master of Science

Department

Electrical and Computer Engineering

Advisory Committee

Advisor Name	Title
Dr. Theodore S. Rappaport	Committee Chair
Dr. Ahmad Safaai-Jazi	Committee Member
Dr. Gary S. Brown	Committee Member

Keywords

peer-to-peer
1.8 GHz
2 GHz
propagation measurements
channel models
radio wave propagation
sliding correlator measurement system
angular spread
low antenna
rake receivers
mobile and portable radio
wideband

Date of Defense

1999-04-29

Availability

unrestricted

Abstract

In an extensive outdoor propagation study, low antenna heights of
1.7 m are used at both the transmitter and the receiver to measure
over 3500 wideband power-delay profiles (PDPs) of the channel for
a peer-to-peer communications system. Rural and urban areas are
studied in 22 different transmitter-receiver links. The results
are used to characterize the narrowband path loss, mean delay,
root-mean-square (RMS) delay spread, and timing jitter of the
peer-to-peer wideband channel. Small-scale fading characteristics are
measured in detail by measuring and analyzing 160 PDPs within each
local area. This thesis shows the measurement setup for the
calculation of fading rate variance and angular spread and reports
the first known attempt to calculate angular spread from track
power measurements. New analysis presented in this thesis shows
the effect of measurement error in the calculation of angular
spread. The expected characteristics of angular spread are
derived using two different angle-of-arrival (AOA) models from the
literature. Measurement results show initial validation of
Durgin's angular spread theory. A new measurement-based algorithm
for simulating wideband fading processes is developed and
implemented. This simulation technique shows promise in the
simulation of high-bit rate peer-to-peer radio communication
systems.

Files

Filename		Size	Approximate Download Time (Hours:Minutes:Seconds)
Filename		Size	28.8 Modem	56K Modem	ISDN (64 Kb)	ISDN (128 Kb)	Higher-speed Access
	AppendixA.pdf	4.80 Mb	00:22:13	00:11:26	00:10:00	00:05:00	00:00:25
	thesisetd.pdf	2.76 Mb	00:12:46	00:06:34	00:05:44	00:02:52	00:00:14