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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/2926

Title: Performance analysis of maximum likelihood detection for decode and forward MIMO relay channels in Rayleigh fading
Authors: SHARMA, GVV
GANWANI, V
DESAI, UB
MERCHANT, SN
Issue Date: 2009
Publisher: IEEE
Citation: 2009 IEEE WIRELESS COMMUNICATIONS & NETWORKING CONFERENCE, VOLS 1-5,802-807
Abstract: Closed form expressions for the bit error rate (BER) for a multiple input multiple output (MIMO) relay system employing maximum likelihood (ML) based decode and forward (DF) cooperative diversity are obtained. The DF operation at the relay involves maximal ratio combining (MRC) on the source-relay link and space-time coding (STC) on the relay-destination link. Exact expressions of the BER are obtained for the case or a single relay supporting two antennas. For a system employing a large number of relays, each having two antennas, approximate expressions for the BER are obtained using the piecewise linear (PL) approximation for the NIL detector. This is done by finding the statistics of conditionally Gaussian random variables, that appear in the decision variable. The validity of the analytical expressions is then verified through simulations. Through numerical results obtained from the BER expressions for large number of relays, it is then shown that the loss in diversity order due to DF can be compensated by using multiple antennas at the relay.
URI: http://dspace.library.iitb.ac.in/xmlui/handle/10054/16443
http://hdl.handle.net/100/2926
ISBN: 978-1-4244-2947-9
ISSN: 1525-3511
Appears in Collections:Proceedings papers

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