Robust MIMO-OFDM system for frequency-selective mobile wireless channels

Arafat Al-Dweik, Fatma Kalbat, Sami Muhaidat, Oscar Filio, Shirook M. Ali

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


This paper presents a novel technique to enhance the robustness of space-frequency block coded (SFBC) orthogonal frequency-division multiplexing (OFDM) systems. The proposed system shapes the channel matrix of a frequency-selective fading channel into a piecewise flat fading over each block of two adjacent subcarriers. Analytical and simulation results show that the proposed scheme substantially outperforms the conventional SFBC in frequency-selective fading channels, which assumes that the channel parameters are equal over the duration of the codeword. Moreover, we demonstrate that the proposed system offers a superior performance in fast time-varying channels where the interference that results from the channel variations acts only as an additive noise. In addition to its superior performance, the proposed system has low computational complexity, because it is based on the short-block-length Walsh-Hadamard transform.

Original languageBritish English
Article number6872569
Pages (from-to)1739-1749
Number of pages11
JournalIEEE Transactions on Vehicular Technology
Issue number5
StatePublished - 1 May 2015


  • Frequency-selective channels
  • orthogonal frequency-division multiplexing (OFDM)
  • precoding
  • space-frequency block coded (SFBC)
  • space-time block codes (STBCs)


Dive into the research topics of 'Robust MIMO-OFDM system for frequency-selective mobile wireless channels'. Together they form a unique fingerprint.

Cite this