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Related Experiment Videos

Optically tunable multiband UWB pulse generation.

Hongwei Chen1, Tiliang Wang, Mo Li

  • 1Department of Electronic Engineering, Tsinghua University, Beijing, PR China. chenhw@tsinghua.edu.cn

Optics Express
|June 12, 2008
PubMed
Summary
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A new method generates tunable multiband ultra-wideband (MB-UWB) pulses with suppressed sidelobes for wireless systems. This technique enables flexible generation of MB-UWB pulses for advanced communication applications.

Area of Science:

  • Optoelectronics
  • Wireless Communications
  • Signal Processing

Background:

  • Ultra-wideband (UWB) technology offers high data rates and low power spectral density.
  • Multiband UWB (MB-UWB) systems are desirable for flexible spectrum access and interference mitigation.
  • Existing MB-UWB generation methods face challenges in spectral control and tunability.

Purpose of the Study:

  • To propose and demonstrate a novel method for generating tunable MB-UWB pulses.
  • To achieve significant spectral sidelobe suppression in the generated MB-UWB pulses.
  • To explore the application of this method in MB-UWB over fiber systems.

Main Methods:

  • Utilizing synchronously-apodized polarization modulation.
  • Employing birefringence time delay for pulse shaping.

Related Experiment Videos

  • Tuning modulation frequency to control spectral characteristics.
  • Implementing apodization profiles for sidelobe suppression.

    • Main Results:

    • Successfully generated tunable MB-UWB pulses with spectral sidelobe suppression exceeding 20dB.
    • Generated five distinct bands of MB-UWB pulses with central frequencies ranging from 4GHz to 6GHz.
    • Achieved bandwidths greater than 500MHz for the generated pulses.
    • Demonstrated the transmission of MB-UWB pulses over a wireless channel.

    Conclusions:

    • The proposed method offers a novel and effective approach for MB-UWB pulse generation.
    • The technique provides excellent spectral control, particularly in sidelobe suppression.
    • This method is suitable for advanced multiband modulation UWB over fiber systems.