Analysis of millimetre-wave polarization diverse multiple-input multiple-output capacity

Area of Science:

• Wireless Communications
• Electromagnetics
• Signal Processing

Background:

• Millimetre-wave (mmWave) frequencies offer wide bandwidth for high data rates.
• Antenna misalignment causes signal degradation in uni- and dual-polarized systems.
• Polarization diversity can improve signal reception without spatial diversity limitations.

Purpose of the Study:

• To investigate the orientation robustness of millimetre-wave communication systems.
• To evaluate the performance enhancement offered by a tri-orthogonal dipole system.
• To analyze system capacity in rich scattering environments with polarization diversity.

Main Methods:

• Utilizing a Rician fading channel model for a millimetre-wave, tri-orthogonal, half-wave dipole system.
• Simulating a three-dimensional model to exploit individual sub-channel paths.
• Comparing system capacity with and without multipath effects against dual-polarized systems.

Main Results:

• The inclusion of a third orthogonal dipole provides significant orientation robustness.
• The tri-orthogonal system demonstrates enhanced capacity compared to dual-polarized systems.
• Performance benefits are observed in both clear and rich scattering environments.

Conclusions:

• A tri-orthogonal dipole system offers superior orientation robustness for millimetre-wave wireless communications.
• Polarization diversity in a tri-orthogonal configuration enhances system capacity and reliability.
• This approach mitigates signal degradation issues prevalent in millimetre-wave systems.