Abstract
Several problems that hinder the optimal performance of multiple relays cooperative OFDM wireless networks have been identified recently. Power allocation and relay selection are some of the problems encountered in these systems. In this paper, a bit reloading (BR) OFDM relaying scheme which solves the problem of both power allocation and relay selection in multiple relays cooperative OFDM wireless networks by selecting the best relay to retransmit the OFDM signal is presented. This method varies from other methods in open literature because bit loading is executed at each hop i.e. from source to relay, and from relay to the destination. Because the bottleneck of bit loading with regard to source-to-relay-to-destination subchannel is eliminated, our proposed scheme achieves more power gain and end-to-end data rate. The theoretic analysis and simulation result also demonstrates our scheme has a better performance.
Project supported by the Chongqing Nature Science Foundation of China (No. CSTC2009BA2064), and the Special Fund for Basic Scientific Research of Central Colleges, Chong’qing University (CDJXS11160003)
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Jia, N., Feng, W., Gafai, N.B., Jiang, W. (2014). Adaptive Modulation Based Relay Selection and Power Allocation in Cooperative OFDM Wireless Networks. In: Zhang, B., Mu, J., Wang, W., Liang, Q., Pi, Y. (eds) The Proceedings of the Second International Conference on Communications, Signal Processing, and Systems. Lecture Notes in Electrical Engineering, vol 246. Springer, Cham. https://doi.org/10.1007/978-3-319-00536-2_87
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DOI: https://doi.org/10.1007/978-3-319-00536-2_87
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