|
Douglas Pfeil
Advisors: Kapil R. Dandekar, Ph.D. and
Timothy P. Kurzweg, Ph.D.
Abstract:
Diffuse free space optical (DFSO) local area networks (LAN) offer
many advantages over traditional radio frequency (RF) networks in
terms of potential increases in capacity and security. DFSO links
also provide an advantage over line-of-sight (LOS) free space
optical links in that alignment and interfering objects have less of
an effect on the link performance. Recently, in the RF domain,
Multiple-Input Multiple-Output (MIMO) technology has been applied,
in order to increase channel capacity. However, to date, there has
been little research in determining potential channel capacity gains
due to applying MIMO in a DFSO system.
This thesis explores the theoretical differences in capacity of
SISO, MISO, SIMO and MIMO links in order to quantify the potential
performance increase when using multiple antenna arrays in DFSO
communication. Using the same channel model to determine the
capacity of an optical MIMO system, transceiver geometry designs for
a DFSO MIMO system have been developed, simulated, and compared. To
determine the channel impulse responses of each of the transceiver
designs, the software package, IRSIMIT, is used to simulate the
systems. Physical hardware design is discussed, comparing different
optical components and establishing a design which is capable of
communication with DFSO. Building of the hardware prototype is
underway and initial test results are reported.
Thursday, June 7th, 2007 at 3:30 p.m.
Bossone 303
|
