OFDM amplify-and-forward two-way relaying for multiuser MIMO networks

被引：0
|
作者：
Zhao R. [1 ,2 ]
Zou Y.-Q. [1 ]
Li C.-G. [1 ]
Yang L.-X. [1 ]
机构：
[1] School of Information Science and Engineering, Southeast University
[2] College of Information Science and Engineering, Huaqiao University
来源：
Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2010年 / 32卷 / 03期
关键词：
Amplify-and-forward two-way relay; Beamforming; OFDM; SDMA;
D O I：
10.3724/SP.J.1146.2009.00335
中图分类号：
学科分类号：
摘要：
In multiuser MIMO communication networks, a new amplify-and-forward two-way relaying scheme is proposed employing OFDMA for the multiple access transmission in the first time slot and OFDM/SDMA for the broadcast transmission in the second time slot to improve the performance of the system through utilizing frequency diversity and spatial diversity. Considering the characteristic of two-way relaying, the relay beamforming matrixes are designed according to two methods respectively, i.e., signal to leakage and noise ratio (SLNR) and block diagonalization based zero-forcing (BDZF), on per subcarrier basis. The upper bound on the capacity region of this two-way relay network is also derived by using cut-set theory. Simulation results show that the proposed scheme outperforms three other two-way relaying schemes in terms of sum rate and can approach the upper bound of capacity region.
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页码：617 / 622
页数：5
相关论文
共 9 条
  • [1] Rankov B., Wittneben A., Spectral efficient protocols for half-duplex fading relay channels, IEEE Journal on Selected Areas in Communications, 25, 2, pp. 379-389, (2007)
  • [2] Wu Y., Chou P.A., Kung S.Y., Information exchange in wireless networks with network coding and physical-layer broadcast, 39th Annual Conf. Inf. Sciences and Systems (CISS), pp. 252-258, (2005)
  • [3] Vaze R., Heath R.W., On the capacity and diversity- multiplexing tradeoff of the two-way relay channel, (2008)
  • [4] Telatar E., Capacity of multi-antenna gaussian channels, European Transactions on Telecommunications, 10, 6, pp. 585-595, (1999)
  • [5] Zhang R., Liang Y.C., Chai C.C., Optimal beamforming for two-way multi-antenna relay channel with analogue network coding, (2008)
  • [6] Sadek M., Tarighat A., Sayed A.H., A leakage-based precoding scheme for downlink multi-user MIMO channels, IEEE Transactions Wireless Communication, 6, 5, pp. 1711-1721, (2007)
  • [7] Spencer Q.H., Swindlehurst A.L., Haardt M., Zero-forcing methods for downlink spatial multiplexing in multi-user MIMO channels, IEEE Transactions on Signal Processing, 52, 2, pp. 461-471, (2004)
  • [8] Weng L., Murch R.D., Multi-user MIMO relay system with self-interference cancellation, IEEE Wireless Communication and Networking Conference (WCNC), pp. 958-962, (2007)
  • [9] Cover T., Thomas J., Elements of Information Theory, (1991)
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