Maximum Ratio Combining Precoding for Multi-Antenna Relay Systems
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Abstract
This paper addresses the design of practical communication strategies for multi-antenna amplify-and-forward and decode-and-forward relay systems. We show that simple linear techniques at the source and destination in conjunction with maximum ratio combining can provide an optimal transmission strategy in terms of received SNR without imposing a huge computational load over the relay node(s). Besides, the structures of precoding matrices are very similar at the source and relay nodes, which reduces the complexity as all nodes can play the role of source and relay nodes without changing their transmission structure. Numerical results show that the proposed transmission and reception techniques can improve the received SNR, and hence enhance the ergodic capacity.
- P. Gupta and P. R Kumar, “The Capacity of Wireless Networks,” IEEE Transactions on Information Theory, Vol. 46, No. 2, March 2002, pp. 388-404.
- M. Gastpar and M. Vetterli, “On the Capacity of Wireless Networks: The Relay Case,” Proceedings of 21th Annual joint Conference of the IEEE Computer and Communi- cations, New York, Vol. 3, June 2002, pp. 1577-1586.
- A. Sendonaris, E. Erkip and B. Aaazhang, “User Coope- ration Diversity—Part I: System Description,” IEEE Transactions on Communications, Vol. 51, No. 11, November 2003, pp. 1927-1938.
- A. Sendonaris, E. Erkip and B. Aaazhang, “User Coope- ration Diversity—Part II: Implementation Aspects and Performance Analysis,” IEEE Transactions on Communi- cations, Vol. 51, No. 11, November 2003, pp. 1939-1948.
- J. N. Laneman, D. N. C. Tse and G. W. Wornell, “Cooperative Diversity in Wireless Networks: Efficient Protocols and Outage Behaviour,” IEEE Transactions on Information Theory, Vol. 50, No. 12, December 2004, pp. 3062-3080.
- F. H. P. Fitzek and M. D. Katz, “Cooperation in Wireless Networks: Principles and Applications,” Springer, Nether- land, 2006.
- R. U. Nabar, H. Bölcskei and F. W. Kneubuhler, “Fading Relay Channels: Performance Limits and Space-Time Signal Design,” IEEE Journal on Selected Areas in Communications, Vol. 22, No. 6, August 2004, pp. 1099- 1109.
- J. N. Laneman and G. W. Wornell, “Distributed Space- Time-Coded Protocols for Exploiting Cooperative Diversity in Wireless Networks,” IEEE Transactions on Information Theory, Vol. 49, No. 10, October 2003, pp. 2415-2425.
- A. Stefanov and E. Erkip, “Cooperative Coding for Wireless Networks,” IEEE Transactions on Communica- tions, Vol. 52, No. 9, September 2004, pp. 1470-1476.
- M. Munoz-Medina, J. Vidal and A. Agustion, “Linear Transceiver Design in Nonregenerative Relays with Channel State Information,” IEEE Transactions on Signal Processing, Vol. 55, No. 6, June 2007, pp. 2593-2604.
- A. Bletsas, A. Khisti, D. P. Reed and A. Lippman, “A Simple Cooperative Diversity Method Based on Network Path Selection,” IEEE Journal on Selected Areas in Communications, Vol. 24, No. 3, March 2006, pp. 659- 672.
- A. Bletsas, Intelligent Antenna Sharing in Cooperative Diversity Wireless Networks, Ph.D. Dissertation, Massa- chusetts Institute of Technology, 2005.
- H. Bölcskei, R. U. Nabar, O. Oyman and A. J. Paulraj, “Capacity Scaling Laws in MIMO Relay Networks,” IEEE Transactions on Wireless Communications, Vol. 5, No. 6, June 2006, pp. 1433-1444.