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Performance Analysis of Multihop Full-Duplex NOMA Systems with Imperfect Interference Cancellation and Near-Field
Lam-Thanh Tu1, Van-Duc Phan2, Tan N Nguyen1,3
1Communication and Signal Processing Research Group, Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City 756000, Vietnam.
Sensors (Basel, Switzerland)
|January 8, 2023
Summary
This study analyzes multihop full-duplex (FD) nonorthogonal multiple access (NOMA) systems, deriving outage probability and potential throughput metrics. The findings highlight the benefits of these advanced NOMA systems under realistic interference conditions.
Area of Science:
- Wireless communication systems
- Information theory
- Signal processing
Background:
- Nonorthogonal multiple access (NOMA) enhances spectral efficiency in wireless networks.
- Full-duplex (FD) technology enables simultaneous transmission and reception, increasing potential throughput.
- Multihop networks extend coverage and capacity but introduce complexity.
Purpose of the Study:
- To derive closed-form expressions for outage probability (OP) and potential throughput (PT) in multihop FD-NOMA systems.
- To investigate the impact of imperfect successive interference cancellation (SIC) and self-interference cancellation on system performance.
- To analyze the effects of near-field path-loss and total transmit power on OP and PT.
Main Methods:
- Derivation of closed-form expressions for OP and PT metrics.
- Inclusion of imperfect SIC and self-interference cancellation models.
- Consideration of near-field path-loss for short transmission distances.
- Rigorous derivation of the impact of total transmit power.
- Development of a mathematical framework for baseline systems.
- Monte Carlo simulations for validation.
Main Results:
- Closed-form expressions for OP and PT were successfully derived.
- The performance degradation due to imperfect SIC and self-interference cancellation was quantified.
- Near-field path-loss significantly impacts system performance at short distances.
- Total transmit power critically influences both OP and PT.
- Simulations validated the accuracy of the proposed analytical framework.
Conclusions:
- The proposed analytical framework accurately predicts the performance of multihop FD-NOMA systems.
- The study demonstrates significant performance benefits of the proposed FD-NOMA systems over baseline systems.
- Imperfect cancellation and near-field effects are crucial factors for realistic system design and optimization.
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