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LOW COMPLEXITY DECISION DIRECTED CHANNEL TRACKING FOR MIMO WLAN Ying Chen, Dhammika Jayalath, Thushara, Abhayapala*
 

Summary: LOW COMPLEXITY DECISION DIRECTED CHANNEL TRACKING FOR MIMO WLAN
SYSTEM
Ying Chen, Dhammika Jayalath, Thushara, Abhayapala*
Research School of Information Science and Engineering
The Australian National University
Email: Ying.Chen@rsise.anu.edu.au, {Dhammika.Jayalath, Thushara.Abhayapala}@anu.edu.au
ABSTRACT
It is expected that the next generation wireless local area
networks will be predominantly based on MIMO-OFDM
physical layer. The performance of coherent MIMO-OFDM
based systems critically depends on the availability of ac-
curate channel estimations. Preambles, at the beginning
of each packet, are used to estimate the channels in IEEE
802.11n Systems. However, in mobile communication, when
the channel is time varying, the channel variations within a
given packet increases the packet error rate (PER) in the sys-
tem. So the channel variations have to be tracked by the re-
ceiver. This paper proposes a low complexity channel track-
ing scheme for 802.11n systems to improve the PER. The
delay introduced by the channel tracking scheme is within

  

Source: Abhayapala, Thushara D. - Department of Information Engineering, Australian National University

 

Collections: Computer Technologies and Information Sciences