Power consumption analysis of user-identity feedback

  • Authors:
  • Chan-Soo Hwang;Hichan Moon

  • Affiliations:
  • Samsung Electronics Co. Ltd., South Korea;Telecom. R&D Center, Samsung Electronics Co. Ltd., South Korea

  • Venue:
  • IEEE Communications Letters
  • Year:
  • 2009

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Abstract

User-identity feedback was proposed to achieve multi-user diversity while minimizing feedback load. This letter mathematically shows that the transmit-power consumption of the user-identity feedback converges to zero as the number of users increases. Numerical results in a Rayleigh fading channel show that the transmit-power saving is substantial even with small number of users.