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Joint Power Allocation and Beamforming for Cooperative Networks

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DOI: 10.4236/ijcns.2011.47053    4,567 Downloads   8,010 Views   Citations

ABSTRACT

In this paper, we investigate power allocation problem with the use of transmit beamforming in a dual hop MISO (multiple input single output) relay channel. We consider either amplify and forward (AF) or decode and forward (DF) cooperative protocols at the relay and optimize the power allocated to the relay and the source, under total transmit power constraint, to minimize the bit error rate (BER) of relaying system. Cooperative communication is viewed as a method for increasing diversity gain and reducing end to end path loss. The use of relay can create a virtual antenna array so that it allows users to exploit the advantages of multiple input multiple output (MIMO) techniques. In this work, we solve cooperative ratio, which is defined as the ratio power used for cooperative transmission over the total power. This approach is then compared to an equal power assignment method and its performance enhancement is verified by simulation results.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

S. Maadi and N. Hamdi, "Joint Power Allocation and Beamforming for Cooperative Networks," International Journal of Communications, Network and System Sciences, Vol. 4 No. 7, 2011, pp. 447-451. doi: 10.4236/ijcns.2011.47053.

References

[1] A. Sendonaris, E. Erkip and B. Aazhang, “User Cooperation Diversity Part I: System Description,” IEEE Transactions Communications, Vol. 51, No. 11, 2003, pp. 1927-1938. doi:10.1109/TCOMM.2003.818096
[2] A. Sendonaris, E. Erkip and B. Aazhang, “User Cooperation Diversity Part II: Implementation Aspects and Performance Analysis,” IEEE Transactions Communications, Vol. 51, No. 11, 2003, pp. 1939-1948. doi:10.1109/TCOMM.2003.819238
[3] G. Kramer, M. Gastpar and P. Gupta, “Cooperative Strategies and Capacity the Independent and Identically Distributed Theorems for Relay Networks,” IEEE Transactions on Information Theory, Vol. 51, No. 9, September 2005, pp. 3037-3063. doi:10.1109/TIT.2005.853304
[4] A. Bletsas, A. Khisti, D. P. Reed and A. lippman, “A Simple Cooperative Diversity Method Based on Network Path Election,” IEEE Journal on Selected Areas in Communication, Vol. 24, No. 3, March 2006, pp. 659-672.
[5] K. Azarian, H. E. Gamal and P. Schniter, “On the Achievable Diversity Multiplexing Tradeoff in Half-Duplex Cooperative Channels,” IEEE Transactions on Information Theory, Vol. 51, No. 12, 2005, pp. 4152-4172. doi:10.1109/TIT.2005.858920
[6] D. R. Brown III, “Resource Allocation for Cooperative Transmission in Wireless Networks with Orthogonal Users,” Proceedings of the 38th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, Vol. 2, 7-10 November 2004, pp. 1473-1477.
[7] C. Pan, Y. Cai and Y. Xu, “Capacity, Power Allocation and Partners for SIMO Relay Channels,” Wireless Communications and Mobile Computing, Vol. 7, No. 8, May 2007, pp. 1003-1012. doi:10.1002/wcm.509
[8] V. Mahinthan, L. Cai, J. W. Mark and S. Shen, “Partner Selection Based on Optimal Power Allocation in Cooperative Diversity Systems,” IEEE Transactions on Vehicular Technology, Vol. 57, No. 1, January 2008, pp. 511-520. doi:10.1109/TVT.2007.905441
[9] Y. Fan, A. Adinoyi, J. S. Thompson, H. Yanikomeroglu and H. V. Poor, “A Simple Distributed Antenna Combining Approach for Cooperative Diversity,” IEEE Transactions on Communications, Vol. 57, March 2009, pp. 626-629.
[10] R. H. Y. Louie, Y. Li and B. Vucetic, “Performance Analysis of Beamforming in Two Hop Amplify and Forward Relay Networks,” Proceedings of IEEE International Conference on Communications, Beijing, 19-23 May 2008, pp. 4311-4315.
[11] Y. Jing and H. Jafarkhani, “Network Beamforming Using Relays with Perfect Channel Information,” Proceedings of IEEE International Conference on Acoustics, Speech and Singnal Processing, Honolulu, Vol. 3, 15-20 April 2007, pp. 473-476.
[12] V. Havary-Nassab, S. Shahbazpanahi, A. Grami and Z. Q. Luo, “Distributed Beamforming for Relay Networks Based on Second-Order Statistics of the Channel State Information,” IEEE Transactions on Signal Processing, Vol. 56, No. 9, September 2008, pp. 4306-4316. doi:10.1109/TSP.2008.925945

  
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