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Area of Science:

  • Wireless Communication
  • Signal Processing

Background:

  • Filtered-orthogonal frequency division multiplexing (F-OFDM) is a key multicarrier modulation (MCM) technique for advanced wireless systems.
  • High peak-to-average power ratio (PAPR) in F-OFDM degrades system performance.

Purpose of the Study:

  • Introduce Filtered Orthogonal Wavelet Division Multiplexing (F-OWDM) as an alternative to conventional F-OFDM (C-F-OFDM).
  • Reduce PAPR and improve bandwidth efficiency in MCM systems.

Main Methods:

  • Replaced Fourier Transforms with Wavelet Transforms in the MCM model.
  • Investigated F-OWDM performance using various wavelets (Haar, discrete Meyer, bi-orthogonal, symlet, Daubechies).
  • Analyzed PAPR and bit error rate (BER) under additive white Gaussian noise and flat fading channels.

Main Results:

  • F-OWDM eliminates the need for a cyclic prefix due to overlapping sub-carriers.
  • Demonstrated higher bandwidth efficiency compared to C-F-OFDM.
  • Achieved lower PAPR and BER using F-OWDM.

Conclusions:

  • F-OWDM presents a viable solution for mitigating PAPR issues in F-OFDM.
  • The proposed F-OWDM system offers superior performance in terms of PAPR and BER.
  • Wavelet-based MCM techniques show promise for future wireless communication standards.