Results 11 to 20 of about 238,785 (211)

Simulated Annealing for Resource Allocation in Downlink NOMA Systems in 5G Networks

Applied Sciences, 2021
In this work, we investigate resource allocation and user pairing to improve the system’s Throughput for the downlink non-orthogonal multiple access (NOMA)-based 5G networks.
Osama Abuajwa, Mardeni Bin Roslee, Zubaida Binti Yusoff   +2 more
doaj   +1 more source

Beam Allocation and Power Optimization for Energy-Efficiency in Multiuser mmWave Massive MIMO System

Sensors, 2021
This paper studies beam allocation and power optimization scheme to decrease the hardware cost and downlink power consumption of a multiuser millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) system.
Saidiwaerdi Maimaiti, Gang Chuai, Weidong Gao, Jinxi Zhang   +3 more
doaj   +1 more source

Sum Capacity for Single-Cell Multi-User Systems with M-Ary Inputs

Entropy, 2017
This paper investigates the sum capacity of a single-cell multi-user system under the constraint that the transmitted signal is adopted from M-ary two-dimensional constellation with equal probability for both uplink, i.e., multiple access channel (MAC ...
Pei Yang, Yue Wu, Liqiang Jin, Hongwen Yang   +3 more
doaj   +1 more source

Secrecy rate optimization for SWIPT in two‐way relay networks with multiple untrusted relays and channel estimation errors

IET Communications, 2021
The secrecy rate of two‐way untrusted relay networks with imperfect channel state information based on SWIPT is investigated when multiple relays harvest energy from two sources.
Dayong Yang, Mo Zhang, Biao Wan, Nanrun Zhou   +3 more
doaj   +1 more source

Performance Evaluation of Successive Interference Cancellation on Gain Ratio Power Allocation using Underwater Visible Light Communication Channel

JOIV: International Journal on Informatics Visualization, 2022
Underwater Visible light communication (UVLC) is a network communication wirelessly where information is transmitted employing light through visible waves; in this case, the light source comes from a light-emitting diode (LED) as a transmitter underwater.
Luthfi Nur'Adli, Arfianto Fahmi, Brian Pamukti   +2 more
doaj   +1 more source

Optimization of Power Allocation for a Multibeam Satellite Communication System with Interbeam Interference

Journal of Applied Mathematics, 2014
In multibeam satellite communication systems it is important to improve the utilization efficiency of the power resources, due to the scarcity of satellite power resources.
Heng Wang, Aijun Liu, Xiaofei Pan, Jiong Li   +3 more
doaj   +1 more source

Downlink Power Allocation for CR-NOMA-Based Femtocell D2D Using Greedy Asynchronous Distributed Interference Avoidance Algorithm

Computers, 2023
This paper focuses on downlink power allocation for a cognitive radio-based non-orthogonal multiple access (CR-NOMA) system in a femtocell environment involving device-to-device (D2D) communication. The proposed power allocation scheme employs the greedy
Nahla Nur Elmadina, Rashid Saeed, Elsadig Saeid, Elmustafa Sayed Ali, Maha Abdelhaq, Raed Alsaqour, Nawaf Alharbe   +6 more
doaj   +1 more source

Low-Complexity Power Allocation in NOMA Systems With Imperfect SIC for Maximizing Weighted Sum-Rate

IEEE Access, 2019
In this paper, we investigate the power allocation for maximizing weighted sum rate (WSR) in downlink multiple carriers non-orthogonal multiple access (MC-NOMA) systems with imperfect successive interference cancellation (SIC).
Xiaoming Wang, Ruilu Chen, Youyun Xu, Qingmin Meng   +3 more
doaj   +1 more source

Land use change patterns and landscape ecological risk assessment in the process of watershed ecological compensation

Frontiers in Environmental Science
As China’s pioneering cross-provincial ecological compensation zone, the upper Xin’an River Basin harbors immense ecological value. However, the long-term effects of its compensation policies on land use dynamics and associated landscape ecological risks
Haitao Chen, Haitao Chen, Jiaxue Ren, Wenjing Ren, Wenjing Ren, Hui Luan, Hui Luan, Liancong Luo, Liancong Luo   +8 more
doaj   +1 more source

CNN-Based End-to-End CPU-AP-UE Power Allocation for Spectral Efficiency Enhancement in Cell-Free Massive MIMO Networks

Mathematics
Cell-free massive multiple-input multiple-output (MIMO) networks eliminate cell boundaries and enhance uniform quality of service by enabling cooperative transmission among access points (APs). In conventional cellular networks, user equipment located at
Yoon-Ju Choi, Ji-Hee Yu, Seung-Hwan Seo, Seong-Gyun Choi, Hye-Yoon Jeong, Ja-Eun Kim, Myung-Sun Baek, Young-Hwan You, Hyoung-Kyu Song   +8 more
doaj   +1 more source