Adaptive Per-spatial Stream Power Allocation Algorithms for Single-User MIMO-OFDM Systems

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Paper by: Najib A. OdhahEmad S. Hassan, Moawad I. Dessouky, Waleed E. Al-Hanafy, Saleh A. Alshebeili, and Fathi E. Abd El-Samie

Paper published in: Wireless Personal Communications

Abstract: This paper presents adaptive per-spatial stream power allocation algorithms for Single User Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (SU MIMO-OFDM) systems. Three efficient and low-complexity Greedy Power Allocation (GPA) algorithms are proposed to maximize the throughput and spectral efficiency of the SU MIMO-OFDM systems. Firstly, the low-complexity pre-coded GPA algorithms are developed for the MIMO systems. The spatial sub-channels are created by applying the so-called Singular Value Decomposition (SVD) technique on the MIMO channel matrix, and then the Pre-GPA algorithms are applied to exploit the multi-path and spatial diversities. Secondly, the spatial and frequency diversities are exploited by adaptively allocating the system sub-carriers to the spatial sub-channels followed by Per-Spatial GPA (PSGPA). Finally, spatial multiplexing-based GPA algorithms are proposed to optimize the spectral efficiency of the SU MIMO-OFDM system. An optimal two-dimensional Spatial-Frequency GPA (SFGPA) algorithm is proposed to efficiently improve the average system spectral efficiency. The high computational complexity of the optimal SFGPA solution is simplified by proposing a low-complexity Per-Spatial GPA with Excess Power Moving down (PSGPA-EPMd) algorithm, which moves the per-spatial excess power downwards to enhance the spectral efficiency of the spatial multiplexing-based SU MIMO-OFDM systems. The proposed algorithms achieve better spectral efficiency and maximize the throughput in comparison with conventional algorithms.

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Journal Papers:- 1. N. A. Odhah, E. S. Hassan, M. I. Dessouky, W. E. Al-Hanafy, S. A. Alshebeili, and F. E. A. El-Samie, “Adaptive Per-spatial Stream Power Allocation Algorithms for Single-User MIMO-OFDM Systems,” Wireless Personal Communications, vol. 98, no. 1, pp. 1–31, 2018. 2. K. Tittelbach-Helmrich, N. Odhah, and Z. Stamenkovi’c, “A Novel Medium Access Control Protocol for Real-Time Wireless Communications in Industrial Automation,” International Journal of Communications, Network and System Sciences, vol. 10, no. 11, p. 282, 2017. 3. N. Odhah, “5G-enabled heterogeneous vehicular networks: Radio and network resources management,” International Journal of Sensor Networks and Data Communications, vol. 6, no. 1, p. 38, 2017. 4. F. S. Al-kamali, H. Y. Sakran, and N. A. Odhah. "I/Q Imbalance Problem in SC-FDMA System with DCT and DFT basis Functions." Advances in Electrical Engineering (Hindawi), Vol. 2015, pp. 1-7, Jan. 2015. 5. N. A. Odhah, E. S. Hassan, M. Abdelnaby, W. E. Al-Hanafy, M. I. Dessouky, S. A. Alshebeili, and F. E. Abd El-Samie. "Adaptive Resource Allocation Algorithms for Multi-user MIMO-OFDM Systems." Wireless Personal Communications(Springer), Vol. 80, No. 1, pp. 51-69, 2015. 6. N. A. Odhah, M. I. Dessouky,W. E. Al-Hanafy, and F. E. Abd El-Samie, “Low complexity Greedy Power Allocation Algorithm for Proportional Resource Allocation in Multi-User OFDM Systems,” Journal of Telecommunications and Information Technology (JTIT), pp. 38-45, 2012. 7. N. A. Odhah, M. I. Dessouky, W. E. Al-Hanafy, and F. E. Abd El-Samie, “Low Complexity Precoded Greedy Power Allocation Algorithms for OFDM Communication Systems,” Journal of Signal and Information Processing (JSIP), 3, 185-191, 2012. 8. N. A. Odhah, M. I. Dessouky, W. E. Al-Hanafy, and F. E. Abd El-Samie, , “Low Complexity Per-Spatial Greedy Power Allocation Algorithm for Wireless Single-User MIMO-OFDM Communication Systems," JAUES, vol. 7, no.3, pp. 383- 394, December 2012. 9. N. A. Odhah, K. H. Awadallah, M. I. Dessouky and F. E. Abd El-Samie, “A Comparison Study Between Pre-Equalization Schemes for Single and Multi Carrier Modulation Systems,” International Journal of Wireless Information Networks 18, No.3, Springer, pp. 158-170, 2011. 10. N. A. Odhah, K. H. Awadallah, M. I. Dessouky and F. E. Abd El-Samie, “Regularized Optimum Beamforming For Downlink CDMA Systems,” Progress In Electromagnetics Research, PIERC 5, pp. 195-207, 2008. Conference Papers:- 1. M. Abouzeid, M. Ehrig, N. Odhah, E. Grass, and R. Kraemer, “Robust and low-complexity space time code for industrial automation,” in 10th International Conference on Advanced Infocomm Technology (ICAIT), Sweden, 2018. 2. N. Odhah, K. Tittelbach-Helmrich, and Z. Stamenkovic, “A Low-Latency Medium Access Control Protocol for Industrial Wireless LAN Applications,” in Proceedings of 30th International Conference on Microelectronics, Nis, 2017, pp. 243–246. 3. N. A. Odhah, M. I. Dessouky, W. E. Al-Hanafy, and F. E. Abd El-Samie, “Low Complexity Per-Spatial Greedy Power Allocation Algorithm for Wireless Single-User MIMO-OFDM Communication Systems," The 12th Al-Azhar Engineering International Conference, AEIC2012, Cairo, Egypt, December 2012. 4. N. A. Odhah, M. I. Dessouky, W. E. Al-Hanafy, and F. E. Abd El-Samie, " Per- Spatial Stream Power Allocation Algorithms for Single-User MIMO-OFDM Wireless Communication Systems," The 8th International Conference on Informatics and Systems, INFOS'12, Cairo, Egypt, May 2012. 5. N. A. Odhah, M. I. Dessouky, W. E. Al-Hanafy, and F. E. Abd El-Samie, “Greedy Power Allocation Algorithm for Proportional Resource Allocation in Multi-User OFDM Systems,” 29th National Radio Science Conference, NRSC'29, Cairo University, Egypt, April, 2012. 6. N. A. Odhah, M. I. Dessouky, W. E. Al-Hanafy, and F. E. Abd El-Samie, "An Improved Adaptive Transmission Technique for High Speed Communication Systems," 6th International Computer Engineering Conference, ICENCO2010, Cairo, Egypt, December 2010. 7. N. A. Odhah, M. I. Dessouky, W. E. Al-Hanafy, and F. E. Abd El-Samie, "Low Complexity Transmission Scheme for Multiple Input Multiple Output Communication Systems," 1st International Conference on Electrical and Computer Systems Engineering, ECSE'10, Cairo, Egypt, November, 2010. 8. N. A. Odhah, K. H. Awadallah, M. I. Dessouky and F. E. Abd El-Samie, “Frequency Domain Pre-equalization for MIMO Broadband CDMA Communication Systems,” URSI National Radio Science Conference, NRSC’2009, Cairo, Egypt, Vol. 26 , C02 , 17-19 March 2009. 9. N. A. Odhah, K. H. Awadallah, M. I. Dessouky and F. E. Abd El-Samie, “Efficient Implementation of Downlink CDMA Beamforming With Regularized Zero forcing Equalizer,” URSI National Radio Science Conference, NRSC’2009, Cairo, Egypt, , Vol. 26 , C01 , 17-19 March 2009. 10. N. A. Odhah, K. H. Awadallah, M. I. Dessouky and F. E. Abd El-Samie, “Low Complexity MIMO Pre-Equalization For Cyclic Prefix CDMA System,” WASET International Conference on Communication Technology , ICCT’2009, Penang , Malaysia ,Vol. 38 ,pp.1142-1149 ,27-29 Feb. 2009. 11. N. A. Odhah, K. H. Awadallah, M. I. Dessouky and F. E. Abd El-Samie, “Efficient Implementation of Downlink CDMA Beamforming,” WASET International Conference on Communication Technology, ICCT’2009, Penang, Malaysia, Vol. 38, pp.1134-1141 ,27-29 Feb. 2009.

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