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    Area of Science:

    • Wireless communication systems
    • Terahertz (THz) technology
    • Optical wireless communication

    Background:

    • High-speed wireless communication demands drive Terahertz (THz) technology adoption.
    • Atmospheric turbulence and pointing errors significantly degrade THz propagation performance.
    • Understanding these impairments is crucial for reliable THz systems.

    Purpose of the Study:

    • To analyze the performance of multiple-input/multiple-output (MIMO) systems in the THz band.
    • To investigate the combined effects of atmospheric turbulence and pointing errors on THz propagation.
    • To consider the impact of turbulence on both amplitude and phase.

    Main Methods:

    • Utilized Padé approximation to derive the probability density function of the channel coefficient.
    • Employed Meijer-G function for bit error rate calculation in equal gain combining.
    • Verified theoretical findings using Monte Carlo simulations.
    • Validated theoretical models against actual THz band measurements.

    Main Results:

    • Theoretical analysis showed good agreement with experimental THz measurements.
    • The exponentiated Weibull model is applicable for THz band channel modeling.
    • Atmospheric turbulence was identified as a more significant factor degrading MIMO system performance compared to pointing errors.

    Conclusions:

    • The exponentiated Weibull model provides an accurate representation of THz channel characteristics.
    • MIMO systems in the THz band are susceptible to performance degradation from atmospheric turbulence.
    • Turbulence poses a greater challenge than pointing errors for large-scale THz MIMO systems.