On UW-Based Transmission for MIMO Multi-Carriers with Spatial Multiplexing

Shahab Ehsanfar, Marwa Chafii, Gerhard P. Fettweis

Research output: Contribution to journalArticlepeer-review


In this paper, we design a frame structure for unique word (UW) based transmission of multiple-input-multiple-output (MIMO) systems under doubly-dispersive wireless channel conditions. We elaborate an energy and spectral efficiency analysis of a MIMO UW-based system vs. a conventional MIMO cyclic prefix (CP)-based system. Considering the UW-based transmission for a MIMO multi-carrier, we derive its signal processing algorithms for channel estimation and joint channel-equalization-and-demodulation. Through theoretical derivations as well as extensive simulations, we show that the proposed MIMO UW-based system significantly outperforms the state-of-the-art approaches.

Original languageEnglish (US)
Article number9107491
Pages (from-to)5875-5890
Number of pages16
JournalIEEE Transactions on Wireless Communications
Issue number9
StatePublished - Sep 2020


  • Multiple-input multiple-output (MIMO)
  • channel estimation (CE)
  • cyclic prefix (CP)
  • equalization
  • frequency selective channels
  • time-varying channels
  • unique words (UWs)

ASJC Scopus subject areas

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


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