Paper Info
Title
Performance analysis of LTE downlink system using relay-based selective transmission
Abstract
As society continues to integrate information-based technologies into daily life, there is an increased need for small, powerful mobile phones. Recently, relaying technologies have been researched for standardization of the next generation of mobile communication systems, including third-Generation Partnership Project (3GPP) LTE-Advanced, IEEE 802.16j, and IEEE 802.16m. Especially, LTE-Advanced is an evolutionary version of IMT-2000 defined by the ITU. To satisfy these requirements, relaying technology is considered as a powerful candidate scheme with carrier aggregation, MIMO, and CoMP. Relaying technology has been introduced to guarantee high data rates to multiple users. It can also extend cell coverage or effectively increase the average throughput of the cell by installing relay nodes at cell edges or in shadow areas. Thus, in this paper, we propose a method for boosting reception performance using the downlink transmission method of the LTE system, which is the next-generation mobile communication technology standard currently underway in 3GPP. At the moment, orthogonal frequency division multiplexing (OFDM), which is suitable for high-speed data transmission and multipath, is commonly used in an LTE downlink system. However, the OFDM method has a disadvantage of displaying a relatively higher PAPR at the terminal since it basically uses a multi-carrier. To this end, single carrier division multiple access (SC-FDMA) is used in an LTE uplink system in order to compensate for this defect related to high PAPR of OFDM at such an important terminal where power efficiency is important. However, when the channels in the frequency domain deteriorate signals, SC-FDMA reveals a defect in that the impact of deteriorated parts spreads and causes performance degradation. To this end, we propose that a relay be installed between the station and terminal, the distance between BS and RS be set at 500 or 1,000 m, and orthogonal frequency division multiple access (OFDMA) and SC-FDMA be chosen as transmission methods of RS. This paper found SC-FDMA to be a better choice when RS is closer to BS, whereas OFDMA is a better choice when the distance between BS and RS is farther. The system's reception performance improved when the transmission method fit the circumstances in the middle between BS and MS.
Year
DOI
Venue
2014
10.1007/s00779-013-0674-y
Personal and Ubiquitous Computing
Keywords
Field
DocType
performance analysis,downlink transmission method,relay-based selective transmission,lte system,multiple access,lte uplink system,lte downlink system,better choice,reception performance,transmission method,relaying technology,ofdm method
Multipath propagation,Data transmission,Computer science,Computer network,MIMO,Orthogonal frequency-division multiple access,Relay,Orthogonal frequency-division multiplexing,LTE Advanced,Telecommunications link
Journal
Volume
Issue
ISSN
18
3
1617-4917
Citations 
PageRank 
References 
3
0.40
33
Authors
4
Name
Order
Citations
PageRank
Roy C. Park11168.04
Hoill Jung229216.67
Kyung-Yong Chung3115480.87
Kuinam J. Kim411122.17