Research ArticleOpen AccessGoogle Scholar indexed
Employing Power Allocation to Enhance Zero Forcing Scheme Advantages over Multi-Antenna Multiple Relay Networks
Department of Electrical Engineering (DCCS Lab), Iran University of Science and Technology, Tehran, Iran
Department of Electrical Engineering (DCCS Lab), Iran University of Science and Technology, Tehran, Iran
- 1 Department of Electrical Engineering (DCCS Lab), Iran University of Science and Technology, Tehran, Iran
- 2 Department of Electrical Engineering (DCCS Lab), Iran University of Science and Technology, Tehran, Iran
International Journal of Communications, Network and System Sciences·Volume 05 (2012)·Pages 736–742·Published 26 November 2012·DOI10.4236/ijcns.2012.511077
Copy link · social · email
Abstract
A multi-antenna multiple relay (MAMR) network is considered and a variation of two-hop zero-forcing amplify-forward relaying method is proposed. Deploying ZF method together with application of diagonal power allocation matrices at the relays, it is shown that the overall MAMR network is simplified to M independent single antenna multiple relay (SAMR) networks, where M is the number of source and destination antennas. This enables to incorporate network beamforming proposed for SAMR networks. Accordingly, using the BER as the performance metric, we present simulation results to show the proposed approach outperforms the common ZF method addressed in the literature.
KeywordsCooperative CommunicationMIMOMultiple Antennas Multiple Relay (MAMR) NetworksZero ForcingPower Allocation
- A. Sendonaris, E. Erkip and B. Aazhang, “User Cooperation Diversity, Part I: System Description,” IEEE Transactions on Communications, Vol. 51, No. 11, 2003, pp. 1927-1938. doi:10.1109/TCOMM.2003.818096
- D. Chen and J. N. Laneman, “Modulation and Demodulation for Cooperative Diversity in Wireless Systems,” IEEE Transactions on Wireless Communications, Vol. 5, No. 7, 2006, pp. 1785-1794. doi:10.1109/TWC.2006.1673090
- J. N. Laneman, D. N. C. Tse and G. W. Wornell, “Cooperative Diversity in Wireless Networks: Efficient Protocols and Outage Behavior,” IEEE Transactions on Information Theory, Vol. 50, No. 12, 2004, pp. 3062-3080. doi:10.1109/TIT.2004.838089
- G. Kramer, M. Gastpar and P. Gupta, “Cooperative Strategies and Capacity Theorems for Relay Networks,” IEEE Transactions on Information Theory, Vol. 51, No. 9, 2005, pp. 3037-3063. doi:10.1109/TIT.2005.853304
- K. A. Yazdi, H. El Gamal and P. Schniter, “On the Design of Cooperative Transmission Schemes,” 41st Allerton Conference on Communication, Control, and Computing, Monticello, 1-3 October 2003.
- T. Issariyakul and, V. Krishnamurthy, “Amplify-and-Forward Cooperative Diversity Wireless Networks: Model, Analysis, and Monotonicity Properties,” IEEE/ACM Transactions on Networking, Vol. 17, No. 1, 2009, pp. 225-238. doi:10.1109/TNET.2008.925090
- R. U. Nabar, F. W. Kneubuhler and H. B?lcskei, “Performance Limits of Amplify-and-Forward Based Fading Relay Channels,” IEEE International Conference Acoustics, Speech and Signal Processing, Vol. 4, 2004, pp. 565-568.
- I. Abou-Faycal and M. Médard, “Optimal Uncoded Regeneration for Binary Antipodal Signaling,” IEEE International Conference on Communications, Vol. 2, 2004, pp. 742-746.
- K. S. Gomadam and S. A. Jafar, “Optimal Relay Functionality for SNR Maximization in Memoryless Relay Networks,” IEEE Journal on Selected Areas in Communications, Vol. 25, No. 2, 2007, pp. 390-340. doi:10.1109/JSAC.2007.070214
- L.-L. Xie and P. R. Kumar, “Multisource, Multidestination, Multirelay Wireless Networks,” IEEE Transactions on Information Theory, Vol. 53, No. 10, 2007, pp. 3586-3595. doi:10.1109/TIT.2007.904783
- E. Beres and R. Adve, “On Selection Cooperation in Distributed Networks,” IEEE 40th Conference on Information Science and Systems, Princeton, 22-24 March 2006, pp. 1056-1061.
- Y. Zhao, R. Adve and T. J. Lim, “Improving Amplify-and-Forward Relay Networks: Optimal Power Allocation Versus Selection,” IEEE Transactions on Wireless Communications, Vol. 6, No. 8, 2007, pp. 3114-3123.