Error performance and capacity of subcarrier BPSK modulated THz wireless systems with pointing errors

Area of Science:

• Wireless Communication
• Optical Wireless Communication
• Signal Processing

Background:

• Terahertz (THz) technology is crucial for future 6G wireless systems due to its high bandwidth and speed.
• Subcarrier modulation is a key technique for THz communication systems.
• Understanding performance limitations like turbulence and pointing errors is vital for reliable THz links.

Purpose of the Study:

• To analyze the performance of subcarrier-modulated THz wireless systems.
• To investigate the impact of composite turbulence and pointing errors on system performance.
• To derive closed-form solutions for bit error rate and outage probability.

Main Methods:

• Performance analysis under log-normal and gamma-gamma turbulence models.
• Derivation of closed-form expressions for bit error rate (BER) and outage probability (OP).
• Asymptotic error performance evaluation and numerical validation.

Main Results:

• Accurate closed-form solutions for BER and OP were derived.
• The impact of varying turbulence strengths and pointing errors on system performance was quantified.
• Numerical results confirmed the accuracy of the derived solutions across different scenarios.

Conclusions:

• The study provides critical insights into the performance of subcarrier THz links.
• The derived solutions are essential for characterizing and optimizing THz wireless systems for 6G.
• This research aids in the design and deployment of reliable THz communication networks.