Ergodic Capacity Estimation with Artificial Neural Networks in NOMA-Based Cognitive Radio Systems

Namdar, Mustafa; Guney, Abdulkadir; Bardak, Fatma Kebire; Basgumus, Arif

doi:10.1007/s13369-023-08279-6

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…Integrating these enabling technologies for OTFS-based NOMA will be a promising way to enhance the functionality of our future study. Besides, cognitive radio [22][23] architecture will be a different solution scenario. Secondary user signal detection algorithms to increase the spectral efficiency [24] for high-speed mobile environments may be another topic of our study.…”

Section: Discussionmentioning

confidence: 99%

Performance Evaluation of OTFS-NOMA Scheme for High Mobility Users

UMAKOĞLU,

NAMDAR,

BAŞGÜMÜŞ

2023

Sakarya University Journal of Computer and Information Sciences

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Orthogonal Time Frequency Space (OTFS) is a promising approach which is widely employed in sixth generation (6G) wireless network systems. Because of its superior performance in high-mobility environments, OTFS modulation has received a lot of attention lately. Due to OTFS modulation works in the delay-Doppler (DD) domain rather than the conventional time-frequency (TF) domain, it works effectively in such circumstances. The idea of non-orthogonal multiple access (NOMA) is integrated into OTFS as an important approach to improve the spectral efficiency (SE) to investigate the efficiency potential and performance. In this research, we study OTFS modulated NOMA system for two destination users in the high mobility environment. The message passing detection algorithm is utilized to examine bit error rate (BER) performance for both near and far users in the proposed OTFS modulated NOMA system. The BER simulation results demonstrate that the power allocation (PA) coefficient, delays, and Doppler effects significantly impact the performance of the system.

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Section: Discussionmentioning

confidence: 99%

Performance Evaluation of OTFS-NOMA Scheme for High Mobility Users

UMAKOĞLU,

NAMDAR,

BAŞGÜMÜŞ

2023

Sakarya University Journal of Computer and Information Sciences

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Cooperative Non-Orthogonal Multiple Access-Based Visible Light Communication Strategy for Power-Constrained Inter-Satellite Links

Alam,

Aziz,

Basit

et al. 2024

IEEE Access

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Microstrip Patch Antenna Design for 5G and Beyond Wireless Communication Systems

Barışer,

Umakoğlu,

Namdar

et al. 2024

Journal of Scientific Reports-A

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This paper gives a theoretical evaluation on how feeder lengths are appropriate for distinct conductor materials using rectangular microstrip patch antenna shape with the help of finite integration techniques (FIT). In this study, the ground surface width is 5.6mm and the ground surface length is 4.65 mm for the rectangular microstrip patch antenna. The length of the patch is 3.44 mm while the patch width is 4.40 mm. The substrate thickness is at 0.20 mm, the patch thickness is 0.035 mm the additional inner feed length is 1.05 mm and the microstrip line feed width is 0.6 mm. Antenna of rectangular microstrip patch type has been designed to work in the 20 – 36 frequency band and working frequency of the proposed antenna is 28 GHz. Compared to the use of a single conductor on the surface of the designed patch antenna, three different conductor materials-copper, gold, and aluminum-were applied to the patch surface of the antenna. The return loss (S11), voltage standing wave ratio (VSWR), bandwidth (BW), directivity and gain of the microstrip antenna parameters are studied using finite integration method Computer Simulation Technology (CST) based on nine different feed lengths in microstrip antenna design. When analyzing the feature of the simulation, the optimal S11 can be observed at the 28 resonant frequencies in the copper conductor. According to the analysis results, for copper conductor the best S11 was obtained at a resonant frequency of 28.03 GHz. The value of S11 is -31.19 dB and the BW value is 968 MHz. For the gold conductor the high return loss is achieved using the at the resonated frequency of 28.01 GHz. S11 value is -32 dB and the BW value is 972 MHz Aluminum conductor has the highest value of S11 with a resonant frequency of 28.01 GHz as shown in -33.29 dB and BW value is 976 MHz. Unsurprisingly, the characterization of the conductor deposition on each structure shows that aluminum conductor yielded the best S11 among all the conductor types. The VSWR is equal to 1.05 for copper conductor at resonant frequency of 28.03 GHz, 1.05 at gold conductor at a resonant frequency of 28.01 and 1.04 for aluminum conductor at a resonant frequency of 28.01 GHz. The maximum directivity values that have been attained in the three-dimensional (3D) representation of the copper conductor, gold and aluminum conductor antennas are nearly 6.99 dBi, respectively. The maximum values of the gain are obtained for the 3D representation of copper, gold and aluminum conductor antennas are 6.61, 6.60 and 6.58 dBi, respectively.

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Ergodic Capacity Estimation with Artificial Neural Networks in NOMA-Based Cognitive Radio Systems

Cited by 3 publications

References 18 publications

Performance Evaluation of OTFS-NOMA Scheme for High Mobility Users

Performance Evaluation of OTFS-NOMA Scheme for High Mobility Users

Cooperative Non-Orthogonal Multiple Access-Based Visible Light Communication Strategy for Power-Constrained Inter-Satellite Links

Microstrip Patch Antenna Design for 5G and Beyond Wireless Communication Systems

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