Performance Improvement Using Single Carrier-FDMA in Relay Based LTE Uplink System

  • Chanhong Park
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 215)


In this paper, we proposed to install a relay between base station and terminal (or user equipment) in order to improve receiving performance of the downlink transfer mode of the Long Term Evolution (LTE) system, which is the next-generation mobile communication technology standard that has been proceeding in the 3rd General Partnership Project (3GPP). In 3GPP LTE-advanced, hybrid OFDMA/SC-FDMA is recommended for its technological capability to make up for the performance gap between OFDMA and SC-FDMA and to make PAPR more efficient. OFDMA is used in LTE downlink in order to make frequency more efficient and raise cell capacity but OFDM struggles with a high PAPR owing to its use of multi carrier wave. LTE uplink, on the other hand, employs SC-FDMA, which is similar to OFDMA, but makes up for OFDM’s big PAPR in mobile stations where electricity efficiency is critical. We conduct a paper to improve receiving performance having selected OFDMA and SC-FDMA, as the transfer mode of base station and relay based on the distance of the relay that has been installed and location of base station. The paper found SC-FDMA to be better choice in RS when it is closer to BS and OFDMA to be a better choice in RS when the distance between BS and RS is farther. The system’s reception performance improved when the most appropriate transmission method fitting the circumstances was used in the middle between BS and MS.


LTE AF & DF Multi-hop relay Relay protocol 


  1. 1.
    Dahlman E, Parkvall S, Skold J, Beming P (2008) 3G evolution: HSPA and LTE for mobile broadband, 2nd.edn. Academic Press, Elsevier, pp 46–81Google Scholar
  2. 2.
    3GPP TSG RAN WG1 (2004) 3GPP TR 25.892 v6.0.0; feasibility study for orthogonal frequency division multiplexing (OFDM) for UTRAN enhancement (Rel-6), June 2004Google Scholar
  3. 3.
    3GPP, TR 36.913 (2008) Requirements for further advancements for E-UTRA (LTE-advanced), V8.0.0, June 2008Google Scholar
  4. 4.
    3GPP, RP-091005 (2008) Proposal for candidate radio interface technologies for LTE-advanced based on LTE. Release 10 and beyond, June 2008Google Scholar
  5. 5.
    IEEE 802.16 Broadband Wireless Access Working Group (2001) Channel models for fixed wireless applications. [Online]
  6. 6.
    Cover T, El Gamal A (1979) Capacity theorems for the relay channel. IEEE Trans Inf Theory IT-25:572–584Google Scholar
  7. 7.
    Hasna MO, Alouini MS (2004) Harmonic mean and end-to-end performance of transmission system with relays. IEEE Trans Commun 52(1):130–135CrossRefGoogle Scholar
  8. 8.
    Laneman J, Tse D, Wornell G (2004) Cooperative diversity in wireless networks: efficient protocols and outage behavior. IEEE Trans Inf Theory 50:3062–3080Google Scholar
  9. 9.
    IEEE 802. 16j-06/026r2 (2007) Baseline document for draft standard for local and metropolitan area networks, part 16: air interface for fixed and mobile broadband wireless access system. Multihop relay specification, FEDGoogle Scholar
  10. 10.
    van Nee R, Prasad R (1999) OFDM for wireless multimedia communications. Artech House, NorwoodGoogle Scholar
  11. 11.
    Pabst Ralf et al (2004) Relay-based deployment concepts for wireless and mobile broadband radio. IEEE Comm Mag 42(9):80–89CrossRefGoogle Scholar
  12. 12.
    Cover T, El Gamal A (1979) Capacity theorems for the relay channel. IEEE Trans Inf Theory IT-25(1):572–584Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.SamSun Technology Research Co. LtdCompany-affiliated ResearchBucheon-siKorea

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