Multi-Hop Relay Protocol Techniques for Performance Enhancement of LTE Downlink System

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


In this paper, we proposed research to boost reception performance in link-down transmission method of LTE system, which is the next-generation mobile communication technology standard underway in 3GPP. At the moment, in LTE downlink system, OFDM which is suitable for high speed data transmission and multipath has been used. However, OFDM method has a weakness displaying the relatively greater PAPR at the terminal because it basically uses multi-carrier. To this end, SC-FDMA has been used in LTE uplink system in order to compensate this big defect related to a great PAPR of OFDM in such an important terminal where power efficiency really matters. However, when signals are deteriorated by the channels in the frequency domain, SC-FDMA reveals a defect in that the impact of deteriorated parts is spreading and causes performance degradation. To this end, it proposed installing relay (RS) in between station(BS) and terminal(MS), set the distance between BS and RS at 500 and 1,000 m, each, and chose OFDMA and SC-FDMA as transmission method of RS. 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.


4G LTE OFDMA SC-FDMA Multi-hop relay 


  1. 1.
    3rd Generation Partnership Project (3GPP) (2009) Evolved universal terrestrial radio access (E-UTRA); physical channels and modulation.
  2. 2.
    Holma H (2009) LTE FOR UMTS—OFDMA and SC-FDMA based radio access. John Wiley & Sons Ltd, Chichester, pp 56–72Google Scholar
  3. 3.
    Zhang J, Huang C, Liu G, Zhang P (2006) Comparison of the Link Level Performance between OFDMA and SC-FDMA. In: Proceedings of the IEEE CNF, 25 Oct 2006Google Scholar
  4. 4.
    Myung HG, Lim J, Goodman DJ (2006) Single carrier FDMA for uplink wireless transmission. IEEE Veh Technol Mag 1(3):30–38Google Scholar
  5. 5.
    Pabst R et al (2004) Relay-based deployment concepts for wireless and mobile broadband radio. IEEE Commun Mag 42(9):88–89CrossRefGoogle Scholar
  6. 6.
    Chuang J, Cimini LJ, Li G, Lin L, McNair B, Sollenberger NR, Suzuki M, Zhao H (1999) Highspeed wireless data access based on combining EDFE with wideband OFDM. IEEE Commun Mag 37:92–98CrossRefGoogle Scholar
  7. 7.
    Genc V, Murphy S, Yu Y, Murphy J (2008) IEEE 802.16j Relay-based wireless access networks: an overview. IEEE Wirel Commun 15(5):56–63CrossRefGoogle Scholar
  8. 8.
    Myung HG, Lim J, Goodman DJ (2006) Single carrier FDMA for uplink wireless transmission. IEEE Veh Technol Mag 1(3):231–239CrossRefGoogle Scholar
  9. 9.
    Lightfoot L, Zhang L, Ren J, Li T (2009) Secure collision-free frequency hopping for OFDMA-based wireless networks. EURASIP J Adv Signal Process 2009:11–15 361063CrossRefGoogle Scholar
  10. 10.
    Ghosh A, Wolter DR, Andrews JG, Chen R (2005) Broadband wireless access with WiMax/802.16: current performance benchmarks and future potential. IEEE Commun Mag 43(2):129–136CrossRefGoogle Scholar
  11. 11.
    Zhang C, Wang Z, Yang Z, Wang J, Song J (2010) Frequency domain decision feedback equalization for uplink SC-FDMA. IEEE Trans Broadcast 56(2):253–257CrossRefGoogle Scholar
  12. 12.
    Berardinelli G, Priyanto BE, Sorensen TB, Mogensen P (2008) Improving SC-FDMA performance by turbo equalization in UTRA LTE uplink. IEEE Proc VTC 54(4):2557–2561Google Scholar
  13. 13.
    Cover T, Gamal AE (1979) Capacity theorems for the relay channel. IEEE Trans Inf Theory IT-25(5):572–584CrossRefGoogle Scholar
  14. 14.
    Holma H, Toskala A (eds) (2006) HSDPA/HSUPA for UMTS-high speed radio access for mobile communications. JohnWiley & Sons Ltd, Chichester, pp 125–157Google Scholar
  15. 15.
    Nagata S, Ofuji Y, Higuchi K, Sawahashi M (2006) Optimum resource block bandwidth for frequency domain channel-dependent scheduling in evolved UTRA downlink OFDM radio access. In: Proceedings of IEEE vehicular technology conference (VTC), vol 1 no 1. Melbourne, pp 206–210Google Scholar
  16. 16.
    Goschini GJ, Gans MJ (1998) On limit of wireless communication in a fading environment when using multiple antenna. Wireless Pers Commun 6(3):331–335Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

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

Personalised recommendations