Relaying Techniques for LTE-Advanced

Konferenz: European Wireless 2015 - 21th European Wireless Conference
20.05.2015 - 22.05.2015 in Budapest, Hungary

Tagungsband: European Wireless 2015

Seiten: 6Sprache: EnglischTyp: PDF

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Autoren:
Abdallah, Asmaa; Serhal, Dina (Computer and Communication Engineering, Rafik Hariri University RHU, Mechref, Lebanon)
Fakih, Kalil (Computer and Communication Engineering, Lebanese University, Beirut, Lebanon)

Inhalt:
Relaying in 4G networks is a new technology for wireless standard. The relaying techniques have been actively studied in which relays have been proposed as means to spread out coverage, increase capacity and in some other fashions as a form of a distributed MIMO to enhance diversity. Thus, they are considered in the standardization process of the newly emerging mobile broadband communication systems such as 3GPP LTE-Advanced, and IEEE 802.16j WiMAX. Some important characteristics of these new network nodes, that make them an attractive research topic, are ease of utilization and reduced deployment costs compared to a regular link BS-MS. The aim of this paper is to understand and describe the existing LTE-Advanced relaying techniques (cooperative and non-cooperative), also introducing new techniques for the Single-Input and Multi-Output relaying, and Multi-input and Multi-Output relaying. All the proposed techniques are compared over a complete LTE-OFDM chain. The relay transmission schemes will be described and evaluated in terms of transmission efficiency and system throughput, under the realistic WINNER II channel model and realistic relay characteristics. Simulation results show that the performances of the relay techniques depend on the received powers from the direct link and the relayed link. Relay Techniques are also investigated under different relay gains.