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Design and Performance Analysis of MIMO Based WLANs

Authors
Mirkovic, Jelena
Chair of Communication Networks (ComNets), Faculty 6, RWTH Aachen University Kontakt: publications@comnets.rwth-aachen.de

Ph. D. Dissertation Aachen University, ABMT 58, p. 159, ISBN:3-86130-938-6, 2008.
Publication Date: Dec, 2008
On page(s):159
ISBN: 3-86130-938-6
Abstract
Multiple Input - Multiple Output (MIMO) refers to the use of multiple antennas at receiver and transmitter in order to improve the performance of communication link and the whole system. It is receiving growing attention for application in wireless networks, reflected in the vivid activities related to MIMO in standardization bodies for different systems, e.g. IEEE 802.11n and 802.16 (Worldwide Interoperability for Microwave Access (WiMAX)), High-Speed Packet Access Evolution (HSPA+) and 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE). Application of MIMO poses several challenges to system design, not only on Physical Layer (PHY), but also on Medium Access Control (MAC) layer, such as signaling methods, channel estimation and Channel State Information (CSI) feedback. Also, adapting channel aware scheduling algorithms to the layered structure of the MIMO channel promisses high performance gains. MAC layer design and performance evaluation of MIMO based Wireless Local Area Networks (WLANs) are addressed in this thesis. Single-User - Distributed Coordination Function (SU-DCF) and Multi-User - Distributed Coordination Function (MU-DCF) are proposed as extensions of the IEEE 802.11 Distributed Coordination Function (DCF). Orthogonal Frequency Division Multiple Access (OFDMA) signaling is introduced in order to efficiently exchange control frames and reduce the overhead that MU-DCF suffers from. Performance evaluation of these two protocols, by means of achievable throughput, provided fairness, and delay characteristic, on both link an system level is presented, revealing the benefits and drawbacks of Single-User (SU) and Multi-User (MU) transmission strategies. Cases of both uninformed transmitter and informed transmitter that applies different channel aware scheduling algorithms are studied, investigating the impact of MU diversity and channel uncertainty on the performance of the scheduling algorithms.
Author Keywords
MIMO Based WLANs
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Bibtex
@PHDTHESIS{DISS_Mirkovic_2008,
  AUTHOR          = {Mirkovic, J.},
  TITLE           = {Design and Performance Analysis of MIMO Based WLANs},
  YEAR            = {2008},
  MONTH           = {Dec},
  VOLUME          = {58},
  PAGES           = {159},
  ADDRESS         = {Lehrstuhl für Kommunikationsnetze},
  SCHOOL          = {Aachen University},
  SERIES          = {ABMT},
  AFFILIATION     = {Chair of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
  ISBN            = {3-86130-938-6},
  KEYWORDS        = {MIMO Based WLANs},
  URL             = {http://www.comnets.rwth-aachen.de} 
}
Letzte Änderung: 15.06.2009 11.36