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Journal of Applied Sciences >

2012 , Vol. 30 >Issue 5: 448 - 454

DOI: https://doi.org/10.3969/j.issn.0255-8297.2012.05.002

Communication Engineering

Modified Bidirectional Decision-Feedback Equalizer for Two-Ray Fading HF Channels

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  • College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics,
    Nanjing 210016, China

Received date: 2011-03-06

  Revised date: 2011-11-08

  Online published: 2012-09-25

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Abstract

In this paper, we consider the use of a bidirectional decision-feedback equalizer (BiDFE) in two-ray fading HF channels. A low-complexity modified BiDFE using the properties of these channels is proposed. Coefficients of the equalizer are optimized, and the outputs of forward DFE and time-reversal DFE are combined using maximal ratio combining (MRC) rules. Theoretical analysis and computer simulations show that the proposed scheme completely cancels inter-symbol interference (ISI) between the two streams so that signal-tonoise ratio (SNR) is the sum of SNRs of the two streams. The performance of modified BiDFE is superior to conventional DFE and bidirectional arbitrated DFE (BAD), while the computation complexity is lower than BAD.

Key words： bidirectional decision-feedback equalizer (BiDFE); two-ray fading channels; high frequency (HF)channel; inter-symbol interference (ISI); maximal ratio combining (MRC)

Cite this article

SHAO Han-qin, XU Da-zhuan, WANG Lei . Modified Bidirectional Decision-Feedback Equalizer for Two-Ray Fading HF Channels[J]. Journal of Applied Sciences, 2012 , 30(5) : 448 -454 . DOI: 10.3969/j.issn.0255-8297.2012.05.002

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