Results 51 to 60 of about 14,777 (220)

EVM Prediction for Massive MIMO [PDF]

2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2019
Signal to interference plus noise ratio (SINR) is a widely common performance metric used in the majority of massive multiple-input, multiple-output (Ma-MIMO) research. This metric requires prior knowledge of the user channel vectors and the interference caused by inaccurate channel state information (CSI).
Wael Boukley Hasan, Angela Doufexi, George Oikonomou, Mark A. Beach   +3 more
openaire   +3 more sources

High-Bandwidth Spatial Equalization for mmWave Massive MU-MIMO with Processing-in-Memory [PDF]

, 2020
All-digital basestation (BS) architectures enable superior spectral efficiency compared to hybrid solutions in massive multi-user MIMO systems. However, supporting large bandwidths with all-digital architectures at mmWave frequencies is challenging as ...
Casta\uf1eda, Oscar, Castañeda, Oscar,, Goldstein, Tom, Durisi, Giuseppe,, Studer, Christoph, Studer, Christoph,, Goldstein, Tom,, Jacobsson, Sven, Durisi, Giuseppe, Jacobsson, Sven,   +9 more
core   +1 more source

The dynamic power allocation to maximize the achievable sum rate for massive MIMO‐NOMA systems

IET Communications, 2022
The demand of mobile networks and quality of service have recently increased to higher Spectral Efficiency (SE) or Energy Efficiency (EE) and massive connectivity for 5G wireless communications.
Zahra Amirifar, Jamshid Abouei
doaj   +1 more source

An efficient multi‐probe enabled midfield over‐the‐air test method for 5G base station antenna pattern reconstruction

Electronics Letters
With the accelerated deployment of 5G massive multi‐input multi‐output (MIMO)‐structured base stations (BSs), accurate and efficient testing of massive MIMO arrays is essential to ensure that the 5G massive MIMO antenna array can perform as expected. The
Xudong An, Yiwen Wang, Qinjuan Zhang, Weimin Wang, Yuanan Liu   +4 more
doaj   +1 more source

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

Advanced Electronic Materials, EarlyView.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source

Massive MU-MIMO-OFDM Uplink with Hardware Impairments: Modeling and Analysis [PDF]

, 2018
\ua9 2018 IEEE. We study the impact of hardware impairments at the base station (BS) of an orthogonal frequency-division multiplexing (OFDM)-based massive multiuser (MU) multiple-input multiple-output (MIMO) uplink system.
Gustavsson, Ulf, Gustavsson, Ulf,, Durisi, Giuseppe,, Studer, Christoph, Studer, Christoph,, Jacobsson, Sven, Durisi, Giuseppe, Jacobsson, Sven,   +7 more
core   +1 more source

Comb‐Driven Coherent Optical Transmitter for Scalable DWDM Interconnects

Laser &Photonics Reviews, EarlyView.
A comb‐driven coherent optical transmitter on a Si/SiN platform enables scalable DWDM interconnects by integrating ultra‐compact microring‐assisted modulators and interleavers. High‐baud coherent signaling achieves 400 Gb/s per wavelength and >$>$1 Tb/s multi‐channel transmission, with projected >$>$10 Tb/s per fiber, offering a path toward energy ...
Alireza Geravand, Erwan Weckenmann, Jean‐Michel Vallée, Farshid Shateri, Zibo Zheng, Simon Levasseur, Bo Yang, Jiajian Chen, Ting Wang, Zihao Wang, Leslie A. Rusch, Wei Shi   +11 more
wiley   +1 more source

Massive MIMO With Dual-Polarized Antennas

IEEE Transactions on Wireless Communications, 2023
This paper considers a single-cell massive MIMO (multiple-input multiple-output) system with dual-polarized antennas at both the base station and users. We study a channel model that includes the key practical aspects that arise when utilizing dual-polarization: channel cross-polar discrimination (XPD) and cross-polar correlations (XPC) at the ...
Özgecan Özdogan, Emil Björnson
openaire   +2 more sources

Development of Efficient Orthogonal Space Time Block Coding in Massive MIMO Systems [PDF]

The fifth generation (5G) of wireless networks is cantered on meeting soaring data demands through innovative technologies, among which multiple-input multiple-output (MIMO) systems have emerged as pivotal.
Derbash, M.
core   +1 more source

Performance Analysis and Power Control of Cell-Free Massive MIMO Systems With Hardware Impairments

IEEE Access, 2018
As an interesting network architecture for future wireless communication systems, cellfree (CF) massive multiple-input multiple-output (MIMO) distributes an excess number of access points (APs) with single or multiple antennas to cooperatively ...
Jiayi Zhang, Yinghua Wei, Emil Bjornson, Yu Han, Shi Jin   +4 more
doaj   +1 more source