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Optimized Power Allocation for Layered-Steered Space-Time Codes

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Abstract

Layered Steered Space-Time Codes (LSSTC) is a recently proposed multiple-input multiple-output system that combines the benefits of vertical Bell Labs space-time (VBLAST) scheme, space-time block codes and beamforming. We suggest a new downlink scheme employing LSSTC with asymmetric power allocation, by assuming that the user feeds the BS with the average signal-to-noise ratio per VBLAST layer through the uplink feedback channel. The motivation behind proposing such a system is to enhance the error performance by assigning power to the layers in an optimal manner. We refer to the system proposed as the optimal power allocation LSSTC (OPA-LSSTC). Our analysis is general such that it includes asymmetric layered systems in which each layer may have different number of antennas and also the power can be assigned to layers asymmetrically.

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Authors and Affiliations

  1. Electrical Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM), P. O. Box 7626, Dhahran, 31261, Saudi Arabia

    Ahmad S. Salim, Salam A. Zummo & Samir N. Al-Ghadhban

  2. Department of Electrical Engineering and Graduate Institute of Communication Engineering, National Taiwan University, Taipei, Taiwan

    Ping-Cheng Yeh

Authors
  1. Ahmad S. Salim
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  2. Salam A. Zummo
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  3. Samir N. Al-Ghadhban
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  4. Ping-Cheng Yeh
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Correspondence to Ahmad S. Salim.

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Salim, A.S., Zummo, S.A., Al-Ghadhban, S.N. et al. Optimized Power Allocation for Layered-Steered Space-Time Codes. Wireless Pers Commun 68, 95–113 (2013). https://doi.org/10.1007/s11277-011-0441-1

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  • DOI: https://doi.org/10.1007/s11277-011-0441-1

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