NDLI: Performance evaluation of hybrid DF-AF OFDM cooperation in Rayleigh channel

Content Provider	IEEE Xplore Digital Library
Author	Lu, H. Nikookar, H. Lian, X.
Copyright Year	2010
Description	Author affiliation: IRCTR, Dept EEMCS, Delft University of Technology, Mekelweg 4, 2628 CD, The Netherlands (Lu, H.; Nikookar, H.; Lian, X.)
Abstract	Cooperative diversity networks have been receiving a lot of attention recently as an attractive way to combat frequency-selectivity of wireless channel, as it consumes neither time nor frequency resources. In the conventional cooperative strategies, relays employ either a decode-and-forward (DF) or an amplify-and-forward (AF) relaying protocol. In this paper, we investigate a new hybrid cooperative scheme that includes both DF and AF relays. First, we propose a thresholding scheme for the division of DF and AF relays. Then, we propose a dynamic optimal combination strategy for the hybrid DF-AF cooperation and removing the unsuitable AF relays. Orthogonal Frequency Division Multiplexing (OFDM) technique is utilized to resolve the multi-path in each cooperative link. Based on space-frequency coding, the hybrid cooperative OFDM can even gain from the multi-path, and obtain the multi-path diversity. In this paper, a closed-form error probability expression for the suggested hybrid DF-AF cooperative OFDM network, under Rayleigh channel, is also provided. The resulting expression is general as it holds for an arbitrary number of cooperating DF-AF branches. Finally, the simulation results explain how diversity is improved in the hybrid cooperative diversity wireless networks.
Starting Page	85
Ending Page	88
File Size	237606
Page Count	4
File Format	PDF
ISBN	9781424472338
ISSN	21533652
e-ISBN	9782874870187
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-27
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	EUROPEAN MICROWAVE ASSOC
Subject Keyword	Fading Protocols OFDM Bit error rate Decoding Relays Signal to noise ratio
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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