Impact of diagonal correlations on MIMO capacity: Application to geometrical scattering models

C. Oestges, B. Clerckx, D. Vanhoenacker-Janvier, A. J. Paulraj

Research output: Contribution to journalConference articlepeer-review

29 Citations (Scopus)


This paper highlights the impact of channel correlations on the capacity of MIMO communications, with a focus on the so called diagonal correlations. Based on this analysis, the limitations of simplified mathematical representations, such as the Kronecker or the diagonal-decorrelation models, are pointed out. Finally, the correlation properties of characteristic geometrical scattering models are studied in order to analyze whether these models can be adequately represented by the simplified formalisms, as well as to quantify the errors introduced by these simplifications. With respect to channel correlations, neither the Kronecker model nor the diagonal-decorrelation assumptions are good representations of the investigated geometrical scattering models. When comparing capacity values, it is found that the diagonal-decorrelation model may yield significant errors. In particular, relative errors on ergodic or outage capacity may be significant for the Kronecker model.

Original languageEnglish
Pages (from-to)394-398
Number of pages5
JournalIEEE Vehicular Technology Conference
Issue number1
Publication statusPublished - 2003
Event2003 IEEE 58th Vehicular Technology Conference, VTC2003-Fall - Orlando, FL, United States
Duration: 2003 Oct 62003 Oct 9


  • Capacity
  • Correlation
  • MIMO
  • Propagation

ASJC Scopus subject areas

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


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