Results 71 to 80 of about 425 (160)

Design and Optimization of a Phase‐Tunable Mixer Based on Cascaded Dual‐Drive Mach–Zehnder Modulator Considering Nonlinear Behavior of Modulator

International Journal of Optics, Volume 2025, Issue 1, 2025.
This paper proposes a novel phase‐tunable mixer based on a cascaded dual‐drive Mach–Zehnder modulator (DDMZM), designed to address the critical need for simultaneous frequency mixing and precise phase control in phased array antennas. Unlike conventional mixers, the proposed structure uniquely combines frequency mixing and phase tuning, enabling ...
Ebrahim Darabi, Heidar Keshavarz, Stefan Wabnitz   +2 more
wiley   +1 more source

Edge Caching and Resource Allocation Scheme of Downlink Cloud Radio Access Networks With Fronthaul Compression

IEEE Access, 2019
With the rapid development of real-time applications in the Internet of Things, people have paid more and more attention on the traffic delay. Cloud radio access networks (C-RANs) are seen as a novel network architecture with significant advantages in ...
Jun Zhang, Yachao Xu, Wenchao Xia, Yanli Xu, Shu Cai, Hongbo Zhu   +5 more
doaj   +1 more source

Delay aware resource allocation in ORAN through network optimization

IET Wireless Sensor Systems, Volume 14, Issue 6, Page 528-538, December 2024.
This Figure shows the basic design of open radio access network architecture, in which the virtual machines collaborate within the physical servers. Abstract A multi variable resource allocation problem is investigated in network environments, specifically focusing on the consideration of quality of service in open radio access network.
Basit N. Khalaf, Wisam Hasan Ali, Raad S. Alhumaima, Haider Ali Jasim Alshamary   +3 more
wiley   +1 more source

Power Over Fiber and Analog Radio Over Fiber Simultaneous Transmission Over Long Distance in Single Mode, Multicore, and Hollow Core Fibers

Laser &Photonics Reviews, Volume 18, Issue 8, August 2024.
Simultaneous Power over Fiber delivery and transmission of 5G New Radio over a single Hollow Core or Multicore Fiber is demonstrated at distances of ten kilometers, yielding promising results compared to Single Mode Fibers. Optically powering a Bluetooth Low Energy load while transmitting 256 QAM data on a 3 GHz RF signal with no degradation is ...
Rubén Altuna, Yongmin Jung, Periklis Petropoulos, Carmen Vázquez   +3 more
wiley   +1 more source

Resource Allocation in Cloud Radio Access Networks With Device-to-Device Communications

IEEE Access, 2017
To alleviate the burdens on the fronthaul and reduce the transmit latency, the device-to-device (D2D) communication is presented in cloud radio access networks (C-RANs).
Yitao Mo, Mugen Peng, Hongyu Xiang, Yaohua Sun, Xiaodong Ji   +4 more
doaj   +1 more source

Energy efficient RF chains selection based on integrated Hungarian and genetic approaches for uplink cell‐free millimetre‐wave massive MIMO systems

IET Communications, Volume 18, Issue 9, Page 569-582, June 2024.
The purpose of this work is to explore the decrease of total consumed power in cell‐free millimetre‐wave (mm‐Wave) massive multiple‐input multiple‐output (MIMO) systems, which can be regarded an essential technology for future wireless generations to improve system performance.
Abdulrahman Al Ayidh, Mohammed M. Alammar   +1 more
wiley   +1 more source

Cell-Free Millimeter-Wave Massive MIMO Systems With Limited Fronthaul Capacity

IEEE Access, 2019
Network densification, massive multiple-input multiple-output (MIMO), and millimeter-wave (mmWave) bands have recently emerged as some of the physical layer enablers for the future generations of wireless communication networks (5G and beyond).
Guillem Femenias, Felip Riera-Palou
doaj   +1 more source

Radio Resource Allocation for Achieving Ultra-Low Latency in Fog Radio Access Networks

IEEE Access, 2018
Fog radio access network (F-RAN) has the significant advantages of local radio signal processing, cooperative radio resource management, and distributed storage capability to tackle the massive users demand at the edge.
G. M. Shafiqur Rahman, Mugen Peng, Kecheng Zhang, Shanzhi Chen   +3 more
doaj   +1 more source

Sum rate maximization in UAV-assisted data harvesting network supported by CF-mMIMO system exploiting statistical CSI

Digital Communications and Networks
Unmanned Aerial Vehicles (UAVs) have been considered to have great potential in supporting reliable and timely data harvesting for Sensor Nodes (SNs) from an Internet of Things (IoT) perspective.
Linlin Xu, Qi Zhu, Wenchao Xia, Jun Zhang, Gan Zheng, Hongbo Zhu   +5 more
doaj   +1 more source

Integrated Silicon Photonics Remote Radio Frontend (RRF) for Single-Sideband (SSB) Millimeter-Wave Radio-Over-Fiber (ROF) Systems

IEEE Photonics Journal, 2019
Radio-over-fiber (ROF)-based mobile fronthaul network supporting the baseband unit and simple remote radio head is a promising network architecture for future wireless networks.
Yeyu Tong, Chi-Wai Chow, Guan-Hong Chen, Ching-Wei Peng, Chien-Hung Yeh, Hon Ki Tsang   +5 more
doaj   +1 more source