Abstract
The IEEE 802.11 wireless LAN (WLAN) standard has achieved world-wide acceptance. However, current products have been excluded from greater adoption due to limitations that include range, capacity, high power drain, coverage dead spots, co-channel interference, and security. Smart antenna sys-tems have demonstrated significant promise to alleviate all of these problems (aside from security) while still remaining compatible with the 802.11 (b/a/g) standards. This paper discusses the history of smart antenna systems, including a brief overview of how smart antennas are being implemented by various companies in the cellular, fixed wireless, and wireless LAN spaces. The cate-gories of smart antenna systems are discussed, including a basic theoretical model of a typical smart antenna setup. Smart antenna implementations gen-erally can be categorized as either switched diversity, beamforming, sector-ization, Space-Division Multiple-Access, or MIMO systems. The reasons that smart antenna systems are not implemented more today are also discussed. This paper then examines the benefits that smart antenna systems provide, focusing on the benefits for WLAN systems. The benefits are analyzed for range, fading reduction, power drain, dead spots, and co-channel interference, and are shown to be significant.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
G. Okamoto, Smart Antenna Systems and Wireless LANs, Kluwer Academic Publishers, Boston, 1999
A. Paulraj and C. Papadias, “Space-Time Processing for Wireless Communications”, IEEE Signal Processing Magazine, pp. 49–83, Nov 1997
J. Liberti, Jr. and T. Rappaport, Smart Antennas for Wireless Communications: IS-95 and Third Generation CDMA Applications, Prentice Hall, 1999
S.-Ting Lee, G. Okamoto and C.-W. Chen, “Evaluation of Smart Antenna Benefits for IEEE 802.11 Systems”, Proc. World Wireless Conference ‘03, May 2003
P802.11, Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications,IEEE Press, 1997
B. Van Veen and K. Buckley,“Beamforming: A Versatile Approach to Spatial Filtering”, IEEE ASSP Magazine, pp. 4–24, April 1969
G. Okamoto, S.-S. Jeng and G. Xu, “Evaluation of Dynamic Slot Allocation Algorithms for the Smart Wireless LAN System”, Proc. SPIE AeroSense ‘89 Conference on Digital Wireless Communication, April 1999, pp. 46–56
R. Sinha, T. Todd, V. Kezys and J. Litva, “Smart Antenna Basestations in Indoor SDMA Networks”, Proc. Wireless’97, July 1997
E Shad, T. Todd, V. Kezys and J. Litva, “Indoor SDMA Capacity Using a Smart Antenna Basestation”, Proc. ICUPC ‘87, Oct. 1997
NOP World-Technology, “Wireless LAN Benefits Study”, Cisco Thought Leadership Series, Fall 2001
G. Okamoto and C.-W. Chen,“Capacity Efficiencies of Time Slot Allocation Schemes for Adaptive Antenna Systems”, Proc. SPIE AeroSense Conference on Digital Wireless Communication, April 2002
G. Okamoto,“Developments and Advances in Smart Antennas for Wireless Communications”, World Markets Series Business Briefing: Wireless Technology 2003, Dec. 2002, pp. 66–69
P. Mannion, “Startup Vivato pushes wireless LAN range to 7 km”, Communication Systems Design, Nov 2002
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2004 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Okamoto, G. (2004). Implementation of Smart Antennas for Wireless LAN Systems. In: Chandran, S. (eds) Adaptive Antenna Arrays. Signals and communication technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-05592-2_28
Download citation
DOI: https://doi.org/10.1007/978-3-662-05592-2_28
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-05775-5
Online ISBN: 978-3-662-05592-2
eBook Packages: Springer Book Archive