Uplink and downlink performance analysis of a structured coded NOMA in Cognitive Radio Networks

• Autorzy: Abd-Alaziz Wael , Awny Safaa N. , Jebur Bilal A.

Identyfikatory

DOI

10.24425/ijet.2025.155453

• Języki publikacji: EN

Abstrakty

EN

This study examines the uplink and downlink com-munication in a structured coded nonorthogonal multiple access (NOMA) in the context of cognitive radio networks (CRNs). Due to the ever-increasing demand for spectrum-efficient communi-cation systems, NOMA has emerged as an effective approach to enhance spectral efficiency by allowing multiple users to share the same frequency resources. Furthermore, CRN also improves spectrum utilization by enabling dynamic spectrum access while primary users are present. This work presents a method that can maximize the spectral efficiency by combining NOMA and CRN mechanisms. The suggested system is evaluated in terms of throughput, spectral efficiency, and bit error rate (BER). The collected results show that the proposed strategy performs better in reducing data mistakes when two users access the spectrum at different signal-to-noise ratios (SNR), with a 7 dB improvement for 1st user and a 2.5 dB improvement for the 2nd user, respectively, in the downlink scenario. Next, the exact BER expressions for both coded and uncoded uplink NOMA systems are introduced. As a result, the proposed system demonstrates superior performance and needs only 11 dB to reach 1 × 10−6 of BER while the uncoded system cannot operate in this harsh environment and the BER is fixed at 0.25 dB.

Słowa kluczowe

EN

NOMA; Cognitive radio networks; CRNs; uplink; downlink; throughput; spectral efficiency; Performance analysis; Low complexity; Bit Error Rate (BER)

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: International Journal of Electronics and Telecommunications
• Rocznik: 2025
• Tom: Vol. 71, No. 3
• Strony: 35
• Opis fizyczny: Bibliogr. 24 poz., tab., rys.

Twórcy

autor

Abd-Alaziz Wael

• University of Sumer, Rifaee, Iraq

• https://orcid.org/0000-0003-4814-7899

autor

Awny Safaa N.

• College of Pharmacy, Mosul, Iraq

autor

Jebur Bilal A.

• Ninevah University, Mosul, Iraq

• https://orcid.org/0000-0003-1621-7733

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).