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On the Performance of the Block-Based Selective OFDM Decode-and-Forward Relaying Scheme for 4G Mobile Communication Systems  

Yang, Wendong (Institute of Communications Engineering, PLA University of Science and Technology)
Cai, Yueming (Institute of Communications Engineering, PLA University of Science and Technology, National Mobile Communications Research Laboratory, Southeast University)
Publication Information
Journal of Communications and Networks / v.13, no.1, 2011 , pp. 56-62 More about this Journal
Abstract
In this paper, we propose a block-based selective orthogonal frequency division multiplexing (OFDM) decode-and-forward relaying scheme for 4G mobile communication systems. In the scheme, an OFDM symbol is divided into blocks and one relay is selected for each block. Theoretical outage performance and error performance are analyzed and evaluated. A unified outage expression is given for our scheme and the other two schemes and the lower bound of the bit error rate of the three schemes is also obtained. The effect of the coherence bandwidth on the proposed scheme is also investigated. Monte Carlo simulations are carried out to validate our analysis. The scheme can obtain a good tradeoff between complexity and performance and can be used in future 4G mobile communication systems.
Keywords
4th generation (4G); bit error rate (BER); cooperative communication; orthogonal frequency division multiplexing (OFDM); outage probability; relay selection;
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