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On the minimum differential feedback for time-correlated MIMO Rayleigh block-fading channels

  • Leiming Zhang
  • , Lingyang Song
  • , Meng Ma
  • , Bingli Jiao

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

In this paper, we investigate the differential channel state information (CSI) feedback problem for a general multiple input multiple output (MIMO) system over time-correlated Rayleigh block-fading channels. Specifically, we derive the closedform minimum differential feedback rate in the presence of channel estimation errors and quantization distortion. With the feedback-channel capacity constraint, we further study the ergodic capacity in a periodic feedback system in terms of the minimum differential feedback rate and the feedback interval. Through theoretical analysis, we find that there exists an optimal differential feedback interval to achieve the maximum ergodic capacity. Analytical results are verified by simulations in a practical periodic differential feedback system employing waterfilling precoder and Lloyd's quantization algorithm.

Original languageEnglish
Article number6138250
Pages (from-to)411-420
Number of pages10
JournalIEEE Transactions on Communications
Volume60
Issue number2
DOIs
StatePublished - Feb 2012
Externally publishedYes

Keywords

  • Differential feedback rate
  • Ergodic capacity
  • Feedback interval
  • MIMO
  • Temporal correlation

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