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Performance Enhancement for B5G/6G Networks Based on Space Time Coding Schemes Assisted by Intelligent Reflecting

Mariam El-Hussien1,2, Bassant Abdelhamid2, Hesham Elbadawy3

  • 1Electronics and Communications Department, Faculty of Engineering Science and Arts, Misr International University, Cairo 11828, Egypt.

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Summary
This summary is machine-generated.

Intelligent Reflecting Surfaces (IRS) combined with Multiple-Input Single-Output (MISO) systems using Orthogonal Space-Time Block Codes (OSTBC) significantly improve wireless communication reliability. This integration enhances spectral efficiency and reduces bit error rates, outperforming existing methods.

Keywords:
Bit Error Rate (BER)Intelligent Reflecting Surfaces (IRS)Multiple-Input Single-Output (MISO)Orthogonal Space-Time Block Code (OSTBC)

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Area of Science:

  • Wireless Communication Engineering
  • Signal Processing
  • Information Theory

Background:

  • Fifth-generation (5G) networks rely on Intelligent Reflecting Surfaces (IRS) and Multiple-Input Single-Output (MISO) for enhanced performance.
  • Fading channels limit spectral efficiency, necessitating advanced techniques like IRS for signal propagation optimization.
  • MISO systems improve data rates and reliability through the use of multiple antennas.

Purpose of the Study:

  • To propose and evaluate an IRS-assisted MISO system integrated with Orthogonal Space-Time Block Codes (OSTBC).
  • To enhance channel reliability and reduce Bit Error Rate (BER) in wireless communication systems.
  • To investigate the combined benefits of OSTBC's transmit diversity and IRS's signal-to-noise ratio improvement.

Main Methods:

  • Development of an IRS-assisted MISO system employing the OSTBC scheme.
  • Analysis of system performance across various modulation schemes.
  • Comparative evaluation against existing published works, including higher-order modulations and rate ¾ OSTBC-assisted IRS.

Main Results:

  • The proposed system demonstrates significant performance improvements by combining OSTBC and IRS.
  • Achieved bit energy to noise power spectral density (Eb/No) gains of 7 dB (16 reflecting elements) and 13 dB (64 reflecting elements).
  • Outperformed previous studies, especially with higher-order modulation schemes and rate ¾ OSTBC-assisted IRS.

Conclusions:

  • The integration of OSTBC with IRS offers substantial performance gains in wireless communication.
  • This approach effectively mitigates fading channel effects and enhances spectral efficiency.
  • The proposed system represents a promising advancement for future wireless networks beyond 5G.