A discrete-time model for triply selective MIMO rayleigh fading channels

Chengshan Xiao, Jingxian Wu, Sang Yick Leong, Yahong Rosa Zheng, Khaled Letaief

Research output: Contribution to journalArticle

144 Citations (Scopus)

Abstract

A statistical discrete-time model is proposed for simulating wideband multiple-input multiple-output (MEMO) fading channels which are triply selective due to angle spread, Doppler spread, and delay spread. The new discrete-time MEMO channel model includes the combined effects of the transmit filter, physical MEMO multipath channel fading, and receive filter, and it has the same sampling period as that of the MEMO receiver. This leads to very efficient simulation of physical continuous-time MEMO channels. A new method is also presented to efficiently generate the MEMO channel stochastic coefficients. The statistical accuracy of the discrete-time MEMO channel model is rigorously verified through theoretical analysis and extensive simulations in different conditions. The high computational efficiency of the discrete-time MEMO channel model is illustrated by comparing it to that of the continuous-time MEMO channel model. The new model is further employed to evaluate the channel capacity of MEMO systems in a triply selective Rayleigh fading environment. The simulation results reveal some interesting effects of spatial correlations, multipaths, and number of antennas on the MEMO channel capacity.

Original languageEnglish
Pages (from-to)1678-1688
Number of pages11
JournalIEEE Transactions on Wireless Communications
Volume3
Issue number5
DOIs
Publication statusPublished - Sep 2004
Externally publishedYes

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Keywords

  • Discrete-time channel model
  • Multiple-input multiple-output (MEMO) channel
  • Multiple-input multiple-output multipath channel capacity
  • Rayleigh fading
  • Triply selective fading
  • Wide-sense stationary uncorrelated scattering (WSSUS) multipath channel

ASJC Scopus subject areas

  • Engineering(all)
  • Computer Networks and Communications

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