Compressive sensing-based sparse channel estimation method for MIMO-OFDM systems

Ni Na Wang*, Guan Gui, Yong Tao Su, Jing Lin Shi, Ping Zhang

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Channel equalization and coherent detection require accurate channel state information (CSI) at the receiver for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. The conventional linear recovery methods, such as least squares (LS) and minimum mean square error (MMSE), are widely adapted in channel estimation under the assumption of rich multipath. However, numerous physical measurements have verified that the practical multipath channels tend to exhibit sparse structures. In this paper, exploiting the channel sparsity, we propose a compressive sensing-based CoSaMP recovery algorithm for MIMO-OFDM sparse channel estimation. Simulations show that the compressive sensing estimation method can obtain the accurate CSI with fewer pilots than conventional linear estimation for MIMO-OFDM systems at the cost of less computational complexity. The proposed method can greatly improve the spectrum efficiency for MIMO-OFDM systems.

Original languageEnglish
Pages (from-to)58-62
Number of pages5
JournalDianzi Keji Daxue Xuebao/Journal of the University of Electronic Science and Technology of China
Volume42
Issue number1
DOIs
Publication statusPublished - Jan 2013

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Keywords

  • Compressive sensing
  • MIMO-OFDM
  • Sparse channel estimation
  • Sparse multipath channel

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