Performance analysis of random unitary beamforming mutli-user MIMO systems

Hyung K. Sung, Jinhee Lee, Young-Chai Ko

Research output: Contribution to journalArticle


In this paper, we analyze the spectral efficiency and outage probability of random unitary beamforming with adaptive modulation (RUBAM) in multi-user MIMO systems. While achievable sum-rate is meaningful from the view point of information theory, the spectral efficiency is more preferable in terms of practical implementation since practical systems do not allow the continuous level modulations. With the help of the exact statistics, we derive the analytical expression of the spectral efficiency and outage probability of RUBAM. Based on your analytical results our proposed RUBAM can be used in designing the practical RUB based MU-MIMO systems.

Original languageEnglish
Pages (from-to)995-1001
Number of pages7
JournalIEICE Electronics Express
Issue number23
Publication statusPublished - 2008 Dec 10



  • Multi-user MIMO
  • Random unitary beamforming and adaptive modulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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