Wavelet-based multicarrier transmission over multipath wireless channels

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Wavelet-based multicarrier transmission over multipath wireless channels

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The conventional Fourier-based complex exponential carriers of a multicarrier system are replaced with orthonormal wavelets in order to reduce the interference. The wavelets are derived from a multistage tree-structured Haar and Daubechies orthonormal quadrature mirror filter (QMF) bank. Compared with the conventional OFDM, it is found that these wavelets reduce the power of ISI and ICI.

Inspec keywords: filtering theory; quadrature mirror filters; multipath channels; interference suppression; intersymbol interference; wavelet transforms; frequency division multiplexing

Other keywords: interference reduction; orthonormal wavelets; ICI reduction; intercarrier interference; multipath wireless channels; Daubechies orthonormal QMF bank; orthogonal FDM; multistage tree-structured Haar QMF bank; ISI reduction; OFDM; wavelet-based multicarrier transmission; quadrature mirror filter bank

Subjects: Communication switching; Modulation and coding methods; Electromagnetic compatibility and interference; Integral transforms in numerical analysis; Filtering methods in signal processing

References

    1. 1)
      • M. Vetterli , J. Kovacevic . (1995) Wavelets and subband coding.
    2. 2)
      • Nikookar, H., Prasad, R.: `Multicarrier transmission with nonuniform carriers in a multipath channel', Int. Conf. Universal Personal Communications, ICUPC'96, September 1996, Boston, MA, USA, p. 628–632.
    3. 3)
      • P.P. Vaidyanathan . (1993) Multirate systems and filterbanks.
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