|
iDEA: Drexel E-repository and Archives >
Drexel Academic Community >
College of Engineering >
Department of Electrical and Computer Engineering >
Faculty Research and Publications (ECE) >
Ad hoc networks: to spread or not to spread?
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1860/2702
|
| Title: | Ad hoc networks: to spread or not to spread? |
| Authors: | Andrews, Jeffrey G.
Weber, Steven
Haenggi, Martin |
| Issue Date: | Dec-2007 |
| Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
| Citation: | IEEE Communications Magazine, 45(12): pp. 84-91. |
| Abstract: | Spread spectrum communication — often
called code-division multiple access — has been
widely adopted over the years for many types of
interference-challenged wireless communication
systems including cellular and cordless telephones,
wireless LANs and PANs, military applications,
and global positioning systems. In this
article we explore whether CDMA, in either its
frequency hopping (FH) or direct sequence (DS)
form, is an appropriate design approach for
wireless ad hoc, or mesh, networks. One goal of
this article is to help provoke a debate by
explaining the main advantages and disadvantages
of CDMA in the context of ad hoc networks
as exposed by recent research. We argue
that CDMA does not inherently improve the
spectral efficiency of ad hoc networks; on the
contrary, its valued interference averaging effect
is not appreciable in ad hoc networks due to the
irregular distribution of both the transmitters
and receivers. On the positive side, both types
(FH and DS) of spread spectrum allow for
longer hop distances and a reversal of the usual
relationship where the desired transmitter must
be closer to the receiver than interfering transmitters.
These two facts allow for significant
advantages over narrowband systems in terms of
energy efficiency and end-to-end delay. |
| URI: | http://dx.doi.org/10.1109/MCOM.2007.4395371
http://hdl.handle.net/1860/2702 |
| Appears in Collections: | Faculty Research and Publications (ECE)
|
Items in iDEA are protected by copyright, with all rights reserved, unless otherwise indicated.
|
www.drexel.edu
