Downlink throughput enhancement of IEEE 802.11a/g using SDMA with a multi-antenna access point

Authors:
Alexandr M. Kuzminskiy;Hamid Reza Karimi;Dennis R. Morgan;Constantinos B. Papadias;Dan Avidor;Jonathan Ling
Affiliations:
Lucent Technologies, Bell Laboratories, The Quadrant, Stonehill Green, Westlea, Swindon, UK;Lucent Technologies, Bell Laboratories, The Quadrant, Stonehill Green, Westlea, Swindon, UK;Lucent Technologies, Bell Laboratories, Murray Hill, NJ;Lucent Technologies, Bell Laboratories, Holmdel, NJ;Lucent Technologies, Bell Laboratories, Holmdel, NJ;Lucent Technologies, Bell Laboratories, Holmdel, NJ
Venue:
Signal Processing - Special section: Advances in signal processing-assisted cross-layer designs
Year:
2006

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Abstract

We address the problem of downlink throughput improvement for IEEE 802.11a/g systems by using a modified access point equipped with multiple antennas. The main restriction is that the standard terminals should not be modified in any way. An alternating time-offset space division multiple access (SDMA) solution is proposed for a conference room scenario. A simulation is based on channel models approved by the IEEE 802.11 Standards Group and takes into account the main features of the IEEE 802.11a/g standard. It is demonstrated that a near doubling of downlink capacity can be achieved in a conference room environment.