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Multiple-Relay-Assisted Spectral Efficient OFDMA Transmission System with Simple Channel Cyclicity Restoration
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 Title & Authors
Multiple-Relay-Assisted Spectral Efficient OFDMA Transmission System with Simple Channel Cyclicity Restoration
Won, Hui-Chul;
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 Abstract
In this paper, we propose a spectral efficient orthogonal frequency division multiple access(OFDMA) transmission system using multiple relays for a shadow area. The performance of the proposed OFDMA system in a shadow area can be improved by applying space-frequency(SF) block code over relaying multi-path channels. A simple channel cyclicity restoration method is also added in the proposed OFDMA system without cyclic prefix(CP) to recover the destruction of channel cyclicity due to the lack of CP. Simulation results show that the proposed OFDMA system without CP is almost same as that of the conventional OFDMA system with sufficient CP, which increases the spectral efficiency of the system.
 Keywords
OFDMA;Relay;SFBC;Cyclic Prefix;Channel Cyclicity;
 Language
Korean
 Cited by
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