Single and multiple relay selection schemes and their achievable diversity orders
IEEE Transactions on Wireless Communications
Secure collision-free frequency hopping for OFDMA-based wireless networks
EURASIP Journal on Advances in Signal Processing - Special issue on dynamic spectrum access for wireless networking
Single-user MIMO for LTE-A uplink: performance evaluation of OFDMA vs. SC-FDMA
RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
LTE for UMTS - OFDMA and SC-FDMA Based Radio Access
LTE for UMTS - OFDMA and SC-FDMA Based Radio Access
IEEE Transactions on Signal Processing
Packet delay analysis of a wireless network with multiple relays under Rayleigh fading channels
Proceedings of the 5th International Conference on Queueing Theory and Network Applications
Radio resource management of self-organizing OFDMA wireless mesh networks
Wireless Communications & Mobile Computing
Performance prediction for OFDMA systems with dynamic power and subcarrier allocation
Computer Communications
MMSE beamforming for SC-FDMA transmission over MIMO ISI channels
EURASIP Journal on Advances in Signal Processing - Special issue on advances in single carrier block modulation with frequency domain processing
IEEE 802.16J relay-based wireless access networks: an overview
IEEE Wireless Communications
High speed wireless data access based on combining EDGE with wideband OFDM
IEEE Communications Magazine
Relay-based deployment concepts for wireless and mobile broadband radio
IEEE Communications Magazine
The Capacity of Several New Classes of Semi-Deterministic Relay Channels
IEEE Transactions on Information Theory
Wireless Personal Communications: An International Journal
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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.