Novel MMSE precoder and decoder designs subject to per-antenna power constraint for uplink multiuser MIMO systems

I. Tai Lu, Jialing Li, Enoch Lu

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

Abstract

Two complementary numerical approaches, the generalized iterative approach (GIA) and the transmit covariance optimization approach (TCOA) are proposed for jointly designing the minimum mean square error (MMSE) precoders and decoders in uplink multiuser multiple-inputmultiple- output (MIMO) systems with a per-antenna power constraint. The TCOA always give optimum solution but works only when the source covariance matrices are projection matrices multiplied by the same constant and the rank constraint on the precoders is relaxed. On the other hand, the GIA does not have these restrictions. Furthermore, it is able to deal with arbitrary source covariances and allows arbitrary numbers of data streams. However, under these more general conditions, the GIA results are only guaranteed to be locally optimum. Regarding computational efficiency, the TCOA is more efficient at high transmission power and the GIA is more efficient at low transmission power when both approaches are applicable. Furthermore, the GIA and the TCOA are equivalent and both are optimum if the transmit covariance matrices obtained from the MMSE design are full rank. Numerical results show that the MSE and BER performances of the two approaches with the more practical per-antenna power constraint are very similar to those with the less practical peruser power constraint.

Original languageEnglish (US)
Title of host publication3rd International Conference on Signal Processing and Communication Systems, ICSPCS'2009 - Proceedings
DOIs
StatePublished - 2009
Event3rd International Conference on Signal Processing and Communication Systems, ICSPCS'2009 - Omaha, NE, United States
Duration: Sep 28 2009Sep 30 2009

Publication series

Name3rd International Conference on Signal Processing and Communication Systems, ICSPCS'2009 - Proceedings

Other

Other3rd International Conference on Signal Processing and Communication Systems, ICSPCS'2009
CountryUnited States
CityOmaha, NE
Period9/28/099/30/09

Keywords

  • Joint mmse precoder and decoder
  • Per-antenna power constraint
  • Uplink multiuser MIMO

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

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