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Sum Rate Optimization by Spatial Precoding for a Multiuser MIMO DFT-Precoded OFDM Uplink

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Abstract

By means of DFT-precoding, the PAPR of OFDM waveforms can be reduced. DFT-precoding has been proposed for uplink transmission in various future wireless communication systems. In this work, we consider DFT-precoding combined with spatial precoding for the uplink of multiuser MIMO OFDM systems. An efficient algorithm is developed to optimize the spatial precoder aiming at maximization of the system sum rate subject to individual power constraints of the users and maintenance of the low PAPR property for one user. Potential gains are shown compared to other popular precoding methods in 3GPP-LTE uplink scenarios.

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Correspondence to Hanguang Wu.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Wu, H., Haustein, T., Jorswieck, E.A. et al. Sum Rate Optimization by Spatial Precoding for a Multiuser MIMO DFT-Precoded OFDM Uplink. EURASIP J. Adv. Signal Process. 2011, 927936 (2011) doi:10.1155/2011/927936

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Keywords

  • Power Constraint
  • Rate Optimization
  • Wireless Communication System
  • OFDM System
  • Publisher Note