Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Performance of Iterative Soft Decision Feedback Equalizers for Single-Carrier Transmission

  • Jeon, Taehyun (Dept. of Electrical and Information Engineering, Seoul National University of Science and Technology) ;
  • Yoon, Seokhyun (Dept. of Electronic and Electrical Eng., Dankook University) ;
  • Kim, Kyungho (Dept. of Electronic and Electrical Eng., Dankook University)
  • Received : 2016.08.01
  • Accepted : 2017.01.17
  • Published : 2017.05.01
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Abstract

In this paper, we consider iterative soft-decision feedback equalizers (sDFE), a.k.a. turbo equalizers for single-carrier transmission. Turbo equalizer takes log-likelihood ratio (LLR) feedback from channel decoder and convert the LLR into symbol estimates and variances to be used for the LLR update at the sDFE. Specifically, we consider both time domain and frequency-domain sDFE and compare their performances. The results shows that frequency-domain sDFE performs better than time-domain one and also that considerable gain can be obtained especially when the channel has deep nulls.

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References

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