Results 111 to 120 of about 20,641 (239)

Regularised Hyper Parameter Bi Level Optimisation With Continual Learning Based Deep Neural Network for Beamforming in Ultra‐Wide Band System

IET Communications, Volume 20, Issue 1, January/December 2026.
This research proposes a Regularised Hyperparameter Bilevel Optimisation with Continual Learning‐based Deep Neural Network (RHBO‐CLDNN) for beamforming in an Ultra‐Wide Band (UWB) system. The RHBO ensures the hyperparameter efficiency at both upper and lower levels, which allows DNN to fine‐tune the unique characteristics of the UWB system, which leads
Pradeep Kumar Siddanna, Bidare Divakarachari Parameshachari, Dharmanna Shivappa Lamani   +2 more
wiley   +1 more source

Large-Scale-Fading Decoding in Cellular Massive MIMO Systems with Spatially Correlated Channels

, 2019
Massive multiple-input--multiple-output (MIMO) systems can suffer from coherent intercell interference due to the phenomenon of pilot contamination.
Björnson, Emil, Mollén, Christopher, Van Chien, Trinh   +2 more
core   +1 more source

Closed‐Form Approximation of Average Error Probability With Finite‐Blocklength Coding Over Lognormal Wireless Communication Links

IET Communications, Volume 20, Issue 1, January/December 2026.
This work extends the Polyanskiy‐Poor‐Verdu (PPV) framework to lognormal wireless links. Specifically, the paper derives a closed‐form approximation for the average error probability under lognormal distribution, effectively generalizing the PPV analysis beyond the additive white Gaussian noise assumption.
Peng Du, Yuan Zhang
wiley   +1 more source

On the Performance of Downlink Channel Estimation‐Based Cell‐Free Massive MIMO Systems Under Correlated Rician Fading Channels

Engineering Reports
The prevailing research on cell‐free massive multiple‐input multiple‐output (MIMO) systems posits that, due to channel reciprocity and channel hardening properties, user equipment (UEs) can decode downlink data solely based on uplink statistical channel ...
Jiarui Li, Yao Zhang, Fengjiao Gan, Na Liu, Longxiang Yang, Hongbo Zhu   +5 more
doaj   +1 more source

Fingerprinting-Based Positioning in Distributed Massive MIMO Systems

, 2015
Location awareness in wireless networks may enable many applications such as emergency services, autonomous driving and geographic routing. Although there are many available positioning techniques, none of them is adapted to work with massive multiple-in-
Larsson, Erik G., Savic, Vladimir
core   +1 more source

Energy‐Efficient Element Selection in RIS‐Assisted Backscatter Communication Systems

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper investigates energy‐efficient reconfigurable intelligent surface (RIS) assisted ambient backscatter communication systems with energy‐harvesting tags. A low‐complexity RIS element selection strategy is developed to satisfy both energy‐harvesting and signal‐to‐interference‐plus‐noise ratio constraints while minimizing overall power ...
Mengistu A. Mulatu, Thembelihle Dlamini, Asrat M. Beyene   +2 more
wiley   +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

On the Uplink Max–Min SINR of Cell-Free Massive MIMO Systems

IEEE Transactions on Wireless Communications, 2019
A cell-free massive multiple-input multiple-output system is considered using a max-min approach to maximize the minimum user rate with per-user power constraints. First, an approximated uplink user rate is derived based on channel statistics.
M. Bashar, K. Cumanan, A. Burr, M. Debbah, H. Ngo   +4 more
semanticscholar   +1 more source

Performance Analysis of ZF Decoder in Uplink IRS‐Aided Cell‐Free Massive MIMO Systems With Local Processing Units

Electronics Letters, Volume 62, Issue 1, January/December 2026.
To address the poor bit error rate (BER) performance and low achievable sum spectral efficiency (ASSE) due to strong receive correlation (RC) at the centralized base station (CBS) in uplink intelligent reflecting surface (IRS)‐aided massive multiple‐input multiple‐output (m‐MIMO) systems, as well as the system overload due to the massive computation ...
Lin Li, Dengyin Zhang, Huijun Hou
wiley   +1 more source

Flexible Pilot Contamination Mitigation with Doppler PSD Alignment

, 2016
Pilot contamination in the uplink (UL) can severely degrade the channel estimation quality at the base station (BS) in a massive multi-input multi-output (MIMO) system.
Luo, Xiliang, Zhang, Xiaoyu
core   +1 more source