Adaptive mode switching in the MIMO broadcast channel

Chulhan Lee, Chan Byoung Chae, Sriram Vishwanath, Robert W. Heath

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


This paper proposes an adaptive mode switching between single user and multi-user multiple input multiple output (MIMO) transmissions for Gaussian MIMO broadcast channels with partial channel state information at the transmitter. With full channel state information, it is known that multi-user transmission outperforms all other policies. With alternate channel state information available at the transmitter, it is not true that one transmission strategy always dominates the other. In particular, under some practical side information assumptions, there is instead a transition point - when the number of users is below this point, single user transmission outperforms multi-user transmission, and the reverse is true when the number of users exceeds this critical value. In this paper, we determine this mode switching point both analytically and numerically for a MIMO channel with transmit side correlation.

Original languageEnglish
Title of host publication2008 IEEE Radio and Wireless Symposium, RWS
Number of pages4
Publication statusPublished - 2008
Event2008 IEEE Radio and Wireless Symposium, RWS - Orlando, FL, United States
Duration: 2008 Jan 222008 Jan 24

Publication series

Name2008 IEEE Radio and Wireless Symposium, RWS


Other2008 IEEE Radio and Wireless Symposium, RWS
Country/TerritoryUnited States
CityOrlando, FL

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Communication


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