• DocumentCode
    1361606
  • Title

    Approaching Large-System Limits Faster in Multiuser MIMO with Adaptive Channel Feedback Adjustments

  • Author

    Sohn, Illsoo ; Andrews, Jeffrey G.

  • Author_Institution
    Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
  • Volume
    14
  • Issue
    12
  • fYear
    2010
  • fDate
    12/1/2010 12:00:00 AM
  • Firstpage
    1125
  • Lastpage
    1127
  • Abstract
    In this paper, we focus on the well-known drawback of per user unitary beamforming rate control (PU2RC) that sum throughput severely degrades with a small number of users due to the mismatch between the actual link quality and channel feedback of users. We propose an adaptive channel feedback adjustment (ACFA) method which estimates the actual link quality by adaptively adjusting user feedback according to the number of scheduled users. Numerical results show that the proposed ACFA considerably increases sum throughput of PU2RC especially when the number of users is small.
  • Keywords
    MIMO communication; feedback; ACFA method; PU2RC; adaptive channel feedback adjustments; link quality; multiuser MIMO systens; multiuser multiple-input multiple-output systems; per user unitary beamforming rate control; Array signal processing; Interference; MIMO; Modulation; Quantization; Signal to noise ratio; Throughput; MIMO; channel feedback; multiuser technique;
  • fLanguage
    English
  • Journal_Title
    Communications Letters, IEEE
  • Publisher
    ieee
  • ISSN
    1089-7798
  • Type

    jour

  • DOI
    10.1109/LCOMM.2010.12.101407
  • Filename
    5610964
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1361606