Abstract
Power allocation between relays and data streams is an important aspect of MIMO relay systems. Different methods are designed to consider weight matrices within relay channels. Commonly employed methods are based on linearly distributed multi antenna relay beamforming with match filter, zero forcing and MMSE techniques. This article proposes a cutback relay power allocation technique to design a suboptimal beamforming weight matrix by ZF–ZF method to decrease BER considerably at high SNRs. This method allocates the unused relay antenna power to others through the associated relay. This allows maximum workable power to increase; consequently the system performance is improved.
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References
Issariyakul, T., & Krishnamurthy, V. (2009). Amplify-and-forward cooperative diversity wireless networks: Model, analysis, and monotonicity properties. IEEE/ACM Transactions on Networking, 17(1), 225–238.
Nabar, R. U., Kneubuhler, F. W., & Bölcskei, H. (2004). Performance limits of amplify-and-forward based fading relay channels. In Proceedings of IEEE international conference acoustics, speech and signal processing, Montreal (Vol. 4, pp. 565–568).
Abou-Faycal, I., & Médard, M. (2004). Optimal uncoded regeneration for binary antipodal signaling. Proceedings IEEE International Conference on Communications, Paris, France (Vol. 2, pp. 742–746).
Gomadam, K. S., & Jafar, S. A. (2007). Optimal relay functionality for SNR maximization in Memoryless relay networks. IEEE Journal of Selected Areas in Communications, 25(2), 390–401.
Hasna, M. O., & Alouini, M. S. (2004). Optimal power allocation for relayed transmission over Rayleigh-fading channels. IEEE Transactions on Wireless Communications, 3, 1999–2004.
Yi, Z., & Kim, I. (2007). Joint optimization of relay-precoders network. IEEE Journal on Selected Areas in Communications, 25(2), 447–458.
Izi, Y. A., & Falahati, A. (2009). On the cooperation and power allocation schemes for multiple-antenna multiple-relay networks. In Proceedings of international conference wireless and mobile communications (ICWMC), Cannes/La Bocca, France, Aug 23–29 (pp. 44–48).
Izi, Y. A., & Falahati, A. (2012). Amplify-forward relaying for multiple antenna multiple relay networks under individual power constraint at each relay. EURASIP Journal on Wireless communications and Networking, 2012, 50.
Samadi, Z., & Falahati, A. (2010). A Transmit Preprocessing Technique in Fixed Relay Networks for Practical Multiuser Transmission. Conference Publications. In IEEE Symposium on computers and communications (ISCC) Riccione, Italy, June 22–25 (pp. 437–442).
Oyman, O., & Paulraj, A. L. (2007). Power-bandwidth tradeoff in dense multi-antenna relay networks. IEEE Transactions on Wireless Communications, 6(6), 2282–2293.
Shi H., Abe, T., Asai, T., & Yoshino, H. (Sept. 2007). Relaying schemes using matrix triangularization for MIMO wireless networks. IEEE Transactions on Communications, 55(9), 1683–1688.
Jing, Y., & Jafarkhani, H. (2009). Network beamforming using relays with perfect channel information. IEEE Transactions on Information Theory, 55(6), 473–476.
Falahati, A., & Attar Izi, Y. (2009). Power allocation for zero forcing scheme in multiple antenna multiple relay networks. In Proceedings of 5th international symposium on telecommunications, Tehran. IEEE
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Moradi, M., Falahati, A. Antenna Power Cutback Manipulation to Optimize Relay Power Allocation over MAMR Networks Employing Zero Forcing Scheme. Wireless Pers Commun 73, 1215–1225 (2013). https://doi.org/10.1007/s11277-013-1274-x
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DOI: https://doi.org/10.1007/s11277-013-1274-x