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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Two Novel Space-Time Coding Techniques Designed for UWB MISO Systems Based on Wavelet Transform.

Amira Ibrahim Zaki1, Ehab F Badran1, Said E El-Khamy1

  • 1Department of Electronics and Communications Engineering, Arab Academy for Science, Technology, and Maritime Transport, Alexandria, Egypt.

Plos One
|December 14, 2016
PubMed
Summary
This summary is machine-generated.

Two novel wavelet space-time coding (WSTC) schemes enhance Ultra-Wideband (UWB) systems. These WSTC methods quadruple data rates compared to conventional space-time coding multi-input single-output (STC MISO) systems.

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Wireless Communications

Background:

  • Ultra-Wideband (UWB) systems offer high data rates but face challenges in spectral efficiency and multipath interference.
  • Conventional space-time coding multi-input single-output (STC MISO) schemes are used to improve reliability but can be limited in data rate enhancement.
  • Novel approaches are needed to increase data rates in UWB systems while maintaining performance.

Purpose of the Study:

  • To introduce two new wavelet space-time coding (WSTC) schemes specifically designed for UWB systems.
  • To enhance data transmission rates by a factor of four compared to existing STC MISO techniques.
  • To improve system performance and receiver complexity through innovative spatial and wavelet domain multiplexing.

Main Methods:

  • Development of two WSTC schemes utilizing spatial and wavelet domain multiplexing.
  • Transmission of four symbols on a single UWB pulse using a selected mother wavelet correlated with the pulse shape.
  • Implementation of Rake receivers to effectively manage dense multipath channel components.

Main Results:

  • The proposed WSTC schemes achieve a fourfold increase in data rate compared to conventional STC MISO.
  • The second WSTC scheme demonstrates superior performance and reduced receiver complexity due to inherent spatial diversity.
  • Simulation results validate the enhanced performance and data rate capabilities of the WSTC schemes.

Conclusions:

  • Wavelet space-time coding (WSTC) offers a significant advancement for UWB communication systems.
  • The developed WSTC schemes provide a viable solution for increasing data rates and improving performance in UWB environments.
  • These novel techniques represent a promising direction for future high-speed wireless communication.