Performance evaluation of hybrid df-af ofdm cooperation in rayleigh channel

Hao Lu, H Nikookar, X Lian

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    8 Citations (Scopus)


    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.
    Original languageEnglish
    Title of host publicationProc. european wireless technology conference
    Editors s.n.
    Place of PublicationParis, France
    Number of pages4
    ISBN (Print)978-1-4244-7233-8
    Publication statusPublished - 2010
    EventWireless Technology Conference (EuWIT), 2010 European, Paris - Paris, France
    Duration: 27 Sept 201028 Sept 2010

    Publication series



    ConferenceWireless Technology Conference (EuWIT), 2010 European, Paris


    • Conf.proc. > 3 pag


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