Single-carrier uplink cooperative DF relay using instantaneous CSI-based adaptive modulation

Kazuhiro Kimura, Tatsunori Obara, Fumiyuki Adachi

Research output: Contribution to conferencePaper

Abstract

An introduction of the adaptive modulation improves the throughput of a 2-time slot cooperative relay. The throughput depends on conditions of mobile terminal (MT)-base station (BS) link, MT-relay station (RS) link, and RS-BS link. However, the cooperative relay is effective when the MT-BS direct link quality is worse than the others. Therefore, the best modulation combination can be chosen using instantaneous CSIs of MT-RS link and RS-BS link In this paper, by neglecting the MT-BS direct link contribution, we introduce an adaptive modulation using instantaneous channel state information (CSI) of MT-RS link and RS-BS link. We evaluate, by computer simulation, the throughput performance of single-carrier (SC) 2-time slot cooperative decode-and-forward (DF) relay using adaptive modulation. It is shown that the introduction of adaptive modulation can reduce by about 1.8 dB the required transmit power for achieving a 1%-outage throughput of 1.4 bps/Hz compared to the conventional method.

Original languageEnglish
Pages146-151
Number of pages6
DOIs
Publication statusPublished - 2012 Dec 1
Event18th Asia-Pacific Conference on Communications: "Green and Smart Communications for IT Innovation", APCC 2012 - Jeju Island, Korea, Republic of
Duration: 2012 Oct 152012 Oct 17

Other

Other18th Asia-Pacific Conference on Communications: "Green and Smart Communications for IT Innovation", APCC 2012
CountryKorea, Republic of
CityJeju Island
Period12/10/1512/10/17

Keywords

  • adaptive modulation
  • cooperative DF relay
  • single-carrier transmission

ASJC Scopus subject areas

  • Computer Networks and Communications

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    Kimura, K., Obara, T., & Adachi, F. (2012). Single-carrier uplink cooperative DF relay using instantaneous CSI-based adaptive modulation. 146-151. Paper presented at 18th Asia-Pacific Conference on Communications: "Green and Smart Communications for IT Innovation", APCC 2012, Jeju Island, Korea, Republic of. https://doi.org/10.1109/APCC.2012.6388119