article · Journal of Communications Software and Systems · 2011

Performance of Blind Turbo Equalizer in Indoor Channels

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Abstract

In this paper, we consider the transmission of turbo coded symbols in the indoor radio environment. The system isaffected by the intersymbol interference (ISI) caused by the multipath time-delay spread of the transmission medium. To reduce the channel effect, we propose to use a blind turbo equalizer combining channel estimation, equalization and turbo decoding. The equalizer consists of an interference canceller (IC) and a MAP-BCJR decoder. To improve system performances, we redefine the channel reliability factor used by the MAP-BCJR decoding algorithm. We propose a new metric that takes into account the statistics of the signal at the equalizer output. The channel coefficient estimation is performed using a recursive least squares (RLS) algorithm. A blind receiver initializationtechnique is proposed. This technique is based on a soft decisiondirected least mean square algorithm (soft DD-LMS). For the proposed turbo detector, the ISI cancellation, channel estimation and decoding are jointly performed through an iterative process where modules exchange a soft information.

Cite this paper

APA 7

Ammari, M. L. (2011). Performance of Blind Turbo Equalizer in Indoor Channels. Journal of Communications Software and Systems, 7(2), 52. https://doi.org/10.24138/jcomss.v7i2.178

MLA 9

Ammari, Mohamed Lassaad. “Performance of Blind Turbo Equalizer in Indoor Channels.” Journal of Communications Software and Systems, vol. 7, no. 2, 2011, p. 52, https://doi.org/10.24138/jcomss.v7i2.178.

Chicago

Ammari, Mohamed Lassaad. 2011. “Performance of Blind Turbo Equalizer in Indoor Channels.” Journal of Communications Software and Systems 7 (2): 52. https://doi.org/10.24138/jcomss.v7i2.178.

Harvard

Ammari, M.L. (2011) ‘Performance of Blind Turbo Equalizer in Indoor Channels’, Journal of Communications Software and Systems, 7(2), p. 52. Available at: https://doi.org/10.24138/jcomss.v7i2.178.

BibTeX

@article{ammari2011performance,
  title = {{Performance of Blind Turbo Equalizer in Indoor Channels}},
  author = {Ammari, Mohamed Lassaad},
  journal = {Journal of Communications Software and Systems},
  volume = {7},
  number = {2},
  pages = {52},
  year = {2011},
  doi = {10.24138/jcomss.v7i2.178}
}

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