Outage channel capacity of direct/cooperative AF relay switched SC-FDMA using spectrum division/adaptive subcarrier allocation

Masayuki Nakada, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In this paper, a direct/cooperative relay switched single carrier-frequency division multiple access (SC-FDMA) using amplify-andforward (AF) protocol and spectrum division/adaptive subcarrier allocation (SDASA) is proposed. Using SDASA, the transmit SC signal spectrum is divided into sub-blocks, to each of which a different set of subcarriers (resource block) is adaptively allocated according to the channel conditions of mobile terminal (MT)-relay station (RS) link, RS-base station (BS) link, and MT-BS link. Cooperative relay does not always provide higher capacity than the direct communication. Switching between direct communication and cooperative relay is done depending on the channel conditions of MT-RS, RS-BS, and MT-BS links. We evaluate the achievable channel capacity by the Monte-Carlo numerical computation method. It is shown that the proposed scheme can reduce the transmit power by about 6.0 (2.0) dB compared to the direct communication (the cooperative AF relay) for a 1%-outage capacity of 3.0 bps/Hz.

    Original languageEnglish
    Pages (from-to)1001-1011
    Number of pages11
    JournalIEICE Transactions on Communications
    VolumeE96-B
    Issue number4
    DOIs
    Publication statusPublished - 2013 Apr

    Keywords

    • Cooperative AF relay
    • SC-FDMA
    • Spectrum division/adaptive subcarrier allocation

    ASJC Scopus subject areas

    • Software
    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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