Performance Analysis of Power Allocation and User-Pairing Techniques for MIMO-NOMA in VLC Systems
Abstract
:1. Introduction
2. System and Channel Models
3. Power Allocation Techniques and User-Pairing Algorithms
3.1. Power Allocation Techniques
3.1.1. Fixed Power Allocation (FPA)
3.1.2. Gain Ratio Power Allocation (GRPA)
3.1.3. Normalized Gain Difference Power Allocation (NGDPA)
3.2. User-Pairing Algorithms
3.2.1. Even Number of Users
3.2.2. Odd Number of Users
- First Strategy: Considers that all users have to be paired. The first pair consists of three users: , and , which correspond to the first user from group (nearest to the LED), the last user from group (farthest from the LED) and the middle user from group , respectively.
- Second Strategy: Employs a different pairing approach in which the middle user is left unpaired, while the remaining users are paired in the same manner as NLUPA with an even number of users.
4. Simulation Results and Discussions
4.1. Two-User Scenario
4.2. Five-User Scenario
4.3. Six-User Scenario
4.4. Performance Comparison
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Description | Symbol | Value |
---|---|---|
PD detection area | A | 1 |
Transmitter semi-angle | 60° | |
Modulation bandwidth | B | 10 MHz |
Output optical power | 10 W | |
Responsivity | 0.53 A/W | |
Optical filter gain | 0.9 | |
Optical concentrator gain | 2.5 | |
Modulation index | 0.5 | |
distance between PDs of each user | 4 cm | |
Vertical spacing between the users and LEDs | 2.15 m | |
Spacing between the LEDs | 1 m | |
FOV of PD | 72° |
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Ibrahim, H.S.; Abaza, M.; Mansour, A.; Alfalou, A. Performance Analysis of Power Allocation and User-Pairing Techniques for MIMO-NOMA in VLC Systems. Photonics 2024, 11, 206. https://doi.org/10.3390/photonics11030206
Ibrahim HS, Abaza M, Mansour A, Alfalou A. Performance Analysis of Power Allocation and User-Pairing Techniques for MIMO-NOMA in VLC Systems. Photonics. 2024; 11(3):206. https://doi.org/10.3390/photonics11030206
Chicago/Turabian StyleIbrahim, Hesham S., Mohamed Abaza, Ali Mansour, and Ayman Alfalou. 2024. "Performance Analysis of Power Allocation and User-Pairing Techniques for MIMO-NOMA in VLC Systems" Photonics 11, no. 3: 206. https://doi.org/10.3390/photonics11030206
APA StyleIbrahim, H. S., Abaza, M., Mansour, A., & Alfalou, A. (2024). Performance Analysis of Power Allocation and User-Pairing Techniques for MIMO-NOMA in VLC Systems. Photonics, 11(3), 206. https://doi.org/10.3390/photonics11030206