Spectrum-sensing opportunistic wireless relay networks: Outage and diversity performance

Kyounghwan Lee, Aylin Yener

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    7 Scopus citations

    Abstract

    We consider a spectrum-sensing opportunistic wireless relay network which is defined by a source node, a destination node, and a group of network clusters each of which consists of a number of cognitive (unlicensed) relay nodes and a primary (licensed) node. In this network, the cognitive nodes can help the source node via a number of possible relaying techniques in an opportunistic fashion, i.e., by acquiring unused spectrum nominally assigned to a primary node. We aim to understand the performance of this system by investigating the impact of spectrum acquisition on the diversity order provided by the cognitive relay nodes. We consider three relay transmission schemes, namely, regenerative decode-and-forward, non-regenerative decode-and-forward and amplify-and-forward under fairly general channel conditions. We find that, regardless of the relay transmission scheme used, the imperfections that may arise during acquisition of the spectrum by the cognitive nodes can cause a significant reduction in diversity order. The good news is that this penalty can be compensated for if a sufficient number of potential relay nodes within a cluster cooperatively sense the spectrum and help the designated cognitive relay node.

    Original languageEnglish (US)
    Title of host publicationConference Record of the 40th Asilomar Conference on Signals, Systems and Computers, ACSSC '06
    Pages206-210
    Number of pages5
    DOIs
    StatePublished - Dec 1 2006
    Event40th Asilomar Conference on Signals, Systems, and Computers, ACSSC '06 - Pacific Grove, CA, United States
    Duration: Oct 29 2006Nov 1 2006

    Publication series

    NameConference Record - Asilomar Conference on Signals, Systems and Computers
    ISSN (Print)1058-6393

    Other

    Other40th Asilomar Conference on Signals, Systems, and Computers, ACSSC '06
    CountryUnited States
    CityPacific Grove, CA
    Period10/29/0611/1/06

    All Science Journal Classification (ASJC) codes

    • Signal Processing
    • Computer Networks and Communications

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  • Cite this

    Lee, K., & Yener, A. (2006). Spectrum-sensing opportunistic wireless relay networks: Outage and diversity performance. In Conference Record of the 40th Asilomar Conference on Signals, Systems and Computers, ACSSC '06 (pp. 206-210). [4176545] (Conference Record - Asilomar Conference on Signals, Systems and Computers). https://doi.org/10.1109/ACSSC.2006.356616