Combined turbo equalization and decoding for frequency selective fading channels

L. Stankovic, P. Clarke, B. Honary

Research output: Contribution to conferencePaper

Abstract

RF sky wave transmissions undergo multipath fading due to propagation through the ionospheric layers. The HF channel is time varying and can be modeled by a tapped delay line of independent complex fading processes each exhibiting correlated fading characteristics specified in the ITU-R recommendation. A practical configuration for a turbo equalizer to combat the effects of intersymbol interference (ISI) in the HF channel, consisting of a soft decision feedback equalizer (SDFE), an interference canceller and a turbo decoder, all being SISO (soft in soft out) processes, is presented. The tap coefficients of the interference canceller filters are updated at each iteration with extrinsic information from the previous decoding operation
Original languageEnglish
Pages140-144
Number of pages5
DOIs
Publication statusPublished - Jun 2003
Event9th International Conference on HF Radio Systems and Techniques, 2003 - Bath, United Kingdom
Duration: 23 Jun 200326 Jun 2003

Conference

Conference9th International Conference on HF Radio Systems and Techniques, 2003
CountryUnited Kingdom
CityBath
Period23/06/0326/06/03

Keywords

  • decision feedback equalisers
  • turbo codes
  • time-varying filters
  • time-varying channels
  • multipath channels
  • iterative decoding
  • ionospheric electromagnetic wave propagation
  • intersymbol interference
  • fading channels
  • interference suppression
  • delay lines
  • combined turbo equalization
  • decoding
  • frequency
  • selective fading

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