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

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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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Authors and Affiliations

  1. Electrical Communications, Electrical Engineering Department, Architecture and Engineering Faculty, Ibb University, Ibb, Yemen

    Najib A. Odhah

  2. Broadband Communications, System Design Department, IHP Microelectronics, Im Technologiepark 25, 15236, Frankfurt (Oder), Germany

    Najib A. Odhah

  3. Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University, Menouf, 32952, Egypt

    Emad S. Hassan, Moawad I. Dessouky, Waleed E. Al-Hanafy & Fathi E. Abd El-Samie

  4. Department of Electrical Engineering, Jazan University, Jazan, Saudi Arabia

    Emad S. Hassan

  5. Faculty of Engineering and Technology, Future University in Egypt, FUE, New Cairo, Egypt

    Waleed E. Al-Hanafy

  6. Electrical Engineering Department, KACST-TIC in Radio Frequency and Photonics for the e-Society (RFTONICS), King Saud University, Riyadh, Saudi Arabia

    Saleh A. Alshebeili

Authors
  1. Najib A. Odhah
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  2. Emad S. Hassan
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  3. Moawad I. Dessouky
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  4. Waleed E. Al-Hanafy
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  5. Saleh A. Alshebeili
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  6. Fathi E. Abd El-Samie
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Corresponding author

Correspondence to Fathi E. Abd El-Samie.

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Odhah, N.A., Hassan, E.S., Dessouky, M.I. et al. Adaptive Per-spatial Stream Power Allocation Algorithms for Single-User MIMO-OFDM Systems. Wireless Pers Commun 98, 1–31 (2018). https://doi.org/10.1007/s11277-017-4186-3

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  • DOI: https://doi.org/10.1007/s11277-017-4186-3

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