Blind-channel identification for MIMO single-carrier zero-padding block-transmission systems

Yi Sheng Chen*, Ching-An Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We propose a blind identification method for multiple-input multiple-output (MIMO) single-carrier zero-padding block-transmission systems. The method uses periodic precoding on the source signal before transmission. The estimation of the channel impulse response matrix consists of two steps: 1) obtain the channel product matrix by solving a lower-triangular linear system; 2) obtain the channel impulse response matrix by computing the positive eigenvalues and eigenvectors of a Hermitian matrix formed from the channel product matrix. The method is applicable to MIMO channels with more transmitters or more receivers. A sufficient condition for identifiability is simply that the channel impulse response matrix is full column rank. The design of the precoding sequence which minimizes the noise effect in covariance matrix estimation is proposed and the effect of the optimal precoding sequence on channel equalization is discussed. Simulations are used to demonstrate the performance of the method.

Original languageEnglish
Pages (from-to)1571-1579
Number of pages9
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume55
Issue number6
DOIs
StatePublished - 1 Jul 2008

Keywords

  • Blind identification
  • Block transmission
  • Multiple-input multiple-output (MIMO) channel
  • Periodic precoding
  • Zero padding (ZP)

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