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

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

Abstract

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.

Keywords

4G LTE OFDMA SC-FDMA Multi-hop relay 

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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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