On the asymptotic performance of multiple antenna channels with quantized feedback

Ahmad Khoshnevis, Ashutosh Sabharwal

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


In this paper, we analyze the asymptotic performance of multiple antenna channels where the transmitter has finite bit channel state information. Using the diversity-multiplexing tradeoff to characterize the system performance, we demonstrate that channel feedback can fundamentally change the system behavior. Even one-bit of information can increase the diversity order of the system compared to the system with no transmitter information. In addition, as the amount of channel information at the transmitter increases, the diversity order for each multiplexing gain increases and goes to infinity for perfect transmitter information. The major reason for diversity order gain is in temporal power control, which adapts the power control strategy based on the average channel conditions of the channel.

Original languageEnglish (US)
Article number4657332
Pages (from-to)3869-3877
Number of pages9
JournalIEEE Transactions on Wireless Communications
Issue number10
StatePublished - Oct 2008


  • Diversity
  • Feedback
  • Finite rate
  • MIMO
  • Multiplexing
  • Quantized

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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