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image of BER Analysis of Underlay Cooperative Cognitive Radio-based NOMA System

Abstract

Background

The integration of Cooperative Communications (CC), Cognitive Radio (CR) technology, and Non-Orthogonal Multiple Access (NOMA) techniques, termed Cooperative Cognitive Radio used NOMA (CCR-NOMA) systems, has emerged as a promising solution to address spectrum scarcity and connectivity challenges anticipated in sixth generation (6G) networks.

Aim

This studyaims to investigate the Bit Error Rate (BER) performance of underlay CCR-NOMA systems.

Methods

We derive precise closed-form expressions for BER at distant users under perfect and imperfect Channel State Information (CSI) conditions. These mathematical formulations are validated through Monte Carlo simulations.

Results

Our results indicate that the near user 𝐶𝑈 exhibits superior performance compared to the far user 𝐶𝑈. Additionally, distant users utilizing the CCR-OMA protocol demonstrate better BER performance than those employing the CCR-NOMA protocol.

Conclusion

The presence of imperfect CSI adversely affects BER performance. Moreover, the derived closed-form expressions for BER in the investigated system align well with Monte Carlo simulations. These findings provide valuable insights for optimizing the performance of CCR-NOMA systems in real-world scenarios.

© 2024 Bentham Science Publishers
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2024-10-09
2024-11-26

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/content/journals/swcc/10.2174/0122103279275260240925050941
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BER Analysis of Underlay Cooperative Cognitive Radio-based NOMA System
Bentham Science Publishers ; https://doi.org/10.2174/0122103279275260240925050941
/content/journals/swcc/10.2174/0122103279275260240925050941
/content/journals/swcc/10.2174/0122103279275260240925050941
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  • Article Type:     Research Article
Keywords: Cooperative Communication ; CCR-NOMA ; Cognitive Radio ; NOMA ; BER ; OMA

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