Combining of loop signals in frequency offset amplify-and-forward relay

Naoki Kikuchi, Mamiko Inamori, Yukitoshi Sanada

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

    Abstract

    The fourth generation mobile communication system is expected to be implemented on frequency bands higher than the bands already assigned for IMT-2000. Therefore, to compensate propagation loss, relay schemes have been investigated. Amplify-and-Forward (AF) relay has advantages in terms of lower complexity and time slot usage. However, the coupling effect causes the loop signal between transmit and receive antennas in the relay station and it can degrade the performance. Thus, in this research, a combining scheme of loop signals and original signals in the frequency offset AF relay scheme is proposed. It is shown that diversity gain and bit error rate (BER) performance vary according to the set of frequency offsets in the relays and modulation schemes. The system with 64 quadrature amplitude modulation (QAM) suffers from interference owing to frequency offsets.

    Original languageEnglish
    Title of host publication2013 IEEE 77th Vehicular Technology Conference, VTC Spring 2013 - Proceedings
    DOIs
    Publication statusPublished - 2013 Dec 1
    Event2013 IEEE 77th Vehicular Technology Conference, VTC Spring 2013 - Dresden, Germany
    Duration: 2013 Jun 22013 Jun 5

    Publication series

    NameIEEE Vehicular Technology Conference
    ISSN (Print)1550-2252

    Other

    Other2013 IEEE 77th Vehicular Technology Conference, VTC Spring 2013
    CountryGermany
    CityDresden
    Period13/6/213/6/5

    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering
    • Applied Mathematics

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  • Cite this

    Kikuchi, N., Inamori, M., & Sanada, Y. (2013). Combining of loop signals in frequency offset amplify-and-forward relay. In 2013 IEEE 77th Vehicular Technology Conference, VTC Spring 2013 - Proceedings [6692481] (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VTCSpring.2013.6692481