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

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.