Title :
Great expectations: the value of spatial diversity in wireless networks
Author :
Diggavi, Suhas N. ; Al-Dhahir, Naofal ; Stamoulis, A. ; Calderbank, A.R.
Author_Institution :
AT&T Shannon Labs, Florham Park, NJ, USA
fDate :
2/1/2004 12:00:00 AM
Abstract :
The effect of spatial diversity on the throughput and reliability of wireless networks is examined. Spatial diversity is realized through multiple independently fading transmit/receive antenna paths in single-user communication and through independently fading links in multiuser communication. Adopting spatial diversity as a central theme, we start by studying its information-theoretic foundations, then we illustrate its benefits across the physical (signal transmission/coding and receiver signal processing) and networking (resource allocation, routing, and applications) layers. Throughout the paper, we discuss engineering intuition and tradeoffs, emphasizing the strong interactions between the various network functionalities.
Keywords :
diversity reception; encoding; fading channels; information theory; multipath channels; multiuser channels; radio links; radio networks; resource allocation; signal processing; space-time codes; telecommunication network routing; information theory; multiple independently fading paths; multiple transmit/receive antenna paths; multiuser communication; receiver signal processing; reliability; resource allocation; routing; signal coding; signal transmission; single-user communication; space-time coding; spatial diversity; throughput; wireless networks; Batteries; Fading; Intelligent networks; Mobile communication; Optical attenuators; Resource management; Signal processing; Throughput; Wireless communication; Wireless networks;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/JPROC.2003.821914
