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      Coordinated Regularized Zero-Forcing Precoding for Multicell MISO Systems with Limited Feedback

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          Abstract

          We investigate coordinated regularized zero-forcing precoding for limited feedback multicell multiuser multiple-input single-output systems. We begin by deriving an approximation to the expected signal-to-interference-plus-noise ratio for the proposed scheme with perfect channel direction information (CDI) at the base station (BS). We also derive an expected SINR approximation for limited feedback systems with random vector quantization (RVQ) based codebook CDI at the BS. Using the expected interference result for the RVQ based limited feedback CDI, we propose an adaptive feedback bit allocation strategy to minimize the expected interference by partitioning the total number of bits between the serving and out-of-cell interfering channels. Numerical results show that the proposed adaptive feedback bit allocation method offers a spectral efficiency gain over the existing coordinated zero-forcing scheme.

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          Author and article information

          Journal
          2015-08-28
          2016-02-17
          Article
          1508.07333
          83309914-c99e-49fe-be88-da9679c30e72

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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          9 pages, 7 figures, accepted in IEEE Transactions on Vehicular Technology
          cs.IT math.IT

          Numerical methods,Information systems & theory
          Numerical methods, Information systems & theory

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