Iterative frequency-domain equalization for general constellations

  • Authors:

  • Rui Dinis;Paulo Montezuma;Nuno Souto;João Silva

  • Affiliations:

  • Dept. de Engenharia Electrotécnica, Faculdade de Ciências e Tecnologia, Univ. Nova de Lisboa, Caparica, Portugal and Inst. de Telecom., Lisboa, Portugal and Uninova, Inst. de Desenvolvim ...;Departamento de Engenharia Electrotécnica, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal and Uninova, Instituto de Desenvolvimento de Novas Tecnolog ...;Instituto de Telecomunicações, Lisboa, Portugal and ISCTE, Lisboa, Portugal;Instituto de Telecomunicações, Lisboa, Portugal and ISCTE, Lisboa, Portugal

  • Venue:
  • Sarnoff'10 Proceedings of the 33rd IEEE conference on Sarnoff
  • Year:
  • 2010

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Abstract

IB-DFE (Iterative Block DFE) is a promising turbo equalization technique for SC-FDE schemes (Single-Carrier with Frequency Domain Equalization). However, typical IB-DFE implementations are tailored for a specific constellation (usually QPSK). In this paper we propose a general method for designing IB-DFE receivers for any constellation. Our approach relies on an analytical characterization of the mapping rule were the constellation symbols are written as a linear function of the transmitted bits. This method is then employed in both uniform and non-uniform QAM constellations.