1.    Laneman J N, Tse D N C, Wornell G W. Cooperative diversity in wireless networks: Efficient protocols and outage behavior. IEEE Transactions on Information Theory, 2004, 50(12): 3062-3080

  2.    Weste N, Skellern D J. VLSI for OFDM. IEEE Communications Magazine, 1998, 36(10):127-131

  3.    Srikanth S, Murugesa Pandian P A, Fernando X. Orthogonal frequency division multiple access in WiMAX and LTE a comparison. IEEE Communications Magazine, 2012, 50(9): 153-161

  4.    Li Y, Wang W B, Kong J, et al. Power allocation and subcarrier pairing in OFDM-based relaying networks. Proceedings of the IEEE International Conference on Communications (ICC’08), May 19-23, 2008, Beijing, China. Piscataway, NJ, USA: IEEE, 2008: 2602-2606

  5.    Sun W L, Li L H, Yang W, et al. Joint subcarrier pairing, relay selection and power allocation in OFDM relay systems. Proceedings of the IEEE International Conference on Communications (ICC’11), Jun 5-9, 2011, Kyoto, Japan. Piscataway, NJ, USA: IEEE, 2011: 5p

  6.    Dang W B, Tao M X, Mu H, et al. Subcarrier-pair based resource allocation for cooperative multi-relay OFDM systems. IEEE Transactions on Wireless Communications, 2010, 9(5):1640-1649

  7.    Tao M X, Liu Y. A network flow approach to throughput maximization in cooperative OFDMA networks. IEEE Transactions on Wireless Communications, 2013, 12(3): 1138-1148

  8.    Xiong C, Li G Y, Zhang S, et al. Energy-and spectral-efficiency tradeoff in downlink OFDMA networks. IEEE Transactions on Communications, 2011, 10(11): 3874-3886

  9.    Mao J L, Xie G, Gao J C. Energy efficiency optimization for OFDM-based cognitive radio systems: A water-filling factor aided search method. IEEE Transactions on Wireless Communications, 2013, 12(5): 2366-2375

10.    Xie R C, Yu F R, Ji H. Interference management and power allocation for energy-efficient cognitive femtocell networks. Mobile Networks and Applications, 2013, 18(4): 578-590

11.    Zappone A, Zhijiat C, Jorswieck E, et al. Energy-efficient non-cooperative power control in relay-assisted interference channels considering circuit dissipated power. Proceedings of the IEEE International Conference on Communications (ICC’12), Jun 10-15, 2012, Ottawa, Canada. Piscataway, NJ, USA: IEEE, 2012: 5936-5940

12.    Wang Y, Xu W J, Yang K W, et al. Optimal energy-efficient power allocation for OFDM-based cognitive radio networks. IEEE Communications Letters, 2012, 16(9): 1420-1423

13.    Fan K. Fixed-point and minimax theorems in locally convex topological linear spaces. Proceedings of the National Academy of Sciences of the United States of America, 1952, 38(2): 121-126

14.    Dimitri D B, John N T. Parallel and distributed computation: Numerical methods. Englewood Cliffs,  NJ, USA: Prentice Hall, 1989

15.    Ferreira C. Gene expression programming: A new adaptive algorithm for solving problems. Complex Systems, 2001,13(2): 87-129