A limited feedback scheme for linear dispersion codes over correlated MIMO channels

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

Abstract

With partial Channel State Information (CSI) at the transmitter, the design of space-time codes for frequency flat, spatially correlated MIMD fading channels, is considered, The focus of the paper is on the class, of space-time block codesknown as Linear Dispersion (LD) codes, introduced by Hassibi and Hochwald. For perfect CSI at the transmitter, the LD codes are optimized with respect to the instantaneous mutual information between the inputs to the space-time encoder and the output of the channel, An equivalent optimization problem is proposed and can that be solved by standard, convex optimization algorithms. It is then conjectured that the.LD codes obtained by maximizing the instantaneous mutual information converge to that obtained from maximizing the averaged mutual information in the large antenna asymptote. Based On the insights drawn from the conjecture, a limited feedback scheme for LD codes is proposed assuming a common codebook at the transmitter and receiver. The numerical result for a scattering environment suggests, that the proposed feedback scheme achieves high performance at low complexity.

Original languageEnglish (US)
Title of host publication2007 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '07
DOIs
StatePublished - Aug 6 2007
Event2007 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '07 - Honolulu, HI, United States
Duration: Apr 15 2007Apr 20 2007

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume3
ISSN (Print)1520-6149

Other

Other2007 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '07
Country/TerritoryUnited States
CityHonolulu, HI
Period4/15/074/20/07

Keywords

  • Array signal processing
  • Channel coding
  • Fading channels
  • Feedback communication
  • Linear antennas

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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