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  • Research Article
  • Open Access

Flexible Transmission Scheme for 4G Wireless Systems with Multiple Antennas

  • 1Email author,
  • 1,
  • 1,
  • 1 and
  • 1
EURASIP Journal on Wireless Communications and Networking20052005:256140

  • Received: 15 October 2004
  • Published:


New air interfaces are currently being developed to meet the high requirements of the emerging wireless communication systems. In this context, the combinations of the multicarrier (MC) and spread-spectrum (SS) technologies are promising candidates. In this paper, we propose a generic transmission scheme that allows to instantiate all the combinations of orthogonal frequency-division multiplexing (OFDM) and cyclic-prefixed single-carrier (SC) modulations with direct-sequence code-division multiple access (DS-CDMA). The generic transmission scheme is extended to integrate the space-division multiplexing (SDM) and the orthogonal space-time block coding (STBC). Based on a generalized matrix model, the linear frequency-domain minimum mean square error (MMSE) joint detector is derived. A mode selection strategy for up- and downlink is advised that efficiently trades off the cost of the mobile terminal and the achieved performance of a high-mobility cellular system. It is demonstrated that an adaptive transceiver that supports the proposed communication modes is necessary to track the changing communication conditions.


  • code-division multiple access
  • OFDM
  • cyclic-prefix single carrier
  • space-division multiplexing
  • space-time block coding
  • joint detection

Authors’ Affiliations

Wireless Research, Interuniversity Micro-Electronics Center (IMEC), Kapeldreef 75, Leuven, B-3001, Belgium


© François Horlin et al. 2005

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.