Results 101 to 110 of about 45,671 (180)

Dysregulated Plasticity in Serotonin, Galanin, and Opioid Systems Contributes to Limbic Seizure Recruitment in Wistar Audiogenic Rat

Journal of Neurochemistry, Volume 170, Issue 3, March 2026.
To find molecular reasons why a genetic rat model (Wistar Audiogenic Rat, WAR) moves from sound‐triggered brainstem seizures to longer‐lasting limbic (temporal‐lobe) epilepsy after repeated loud‐noise exposure. WAR and normal Wistar rats received a 10‐day audiogenic kindling (twice‐daily loud noise).
Tays Araújo Camilo, Evandro Valentim‐Lima, José Antônio Cortes de Oliveira, Norberto Garcia‐Cairasco, Luís Carlos Reis, João Victor Nani, André de Souza Mecawi   +6 more
wiley   +1 more source

Early to Mid‐Holocene Cool Temperature‐Induced Drought in Asian Interior

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Hydroclimatic variations in mid‐latitude Asia during the early to mid‐Holocene and associated mechanisms remain disputed, hampering our understanding of atmospheric circulation controls on regional climatic changes. We report Holocene alkenone records from two Siberian lakes, documenting lake temperature and hydrological changes, and ...
Jiawei Jiang, Huanye Wang, Hu Liu, Guoqiang Chu, Weiguo Liu, Sergey Krivonogov, Zhonghui Liu   +6 more
wiley   +1 more source

Resource Allocation in MU-OFDM Cognitive Radio Systems with Partial Channel State Information

EURASIP Journal on Wireless Communications and Networking, 2010
In wireless communications, the assumption that the transmitter has perfect channel state information (CSI) is often unreasonable, due to feedback delays, estimation errors, and quantization errors.
Shen Zhiqi, Leung Cyril, Huang Dong, Miao Chunyan   +3 more
doaj  

Deep Learning-Based CSI Feedback in Wi-Fi Systems

2024 5th International Symposium on Computer Engineering and Intelligent Communications (ISCEIC)
In Wi-Fi systems, channel state information (CSI) plays a crucial role in enabling access points to execute beamforming operations. However, the feedback overhead associated with CSI significantly hampers the throughput improvements. Recent advancements in deep learning (DL) have transformed the approach to CSI feedback in cellular systems.
Qi, Fan, Guo, Jiajia, Cui, Yiming, Li, Xiangyi, Wen, Chao-Kai, Jin, Shi   +5 more
openaire   +2 more sources

Research on CSI feedback and precoding in FDD cell-free massive MIMO systems

Dianxin kexue
For frequency division duplexing (FDD) cell-free massive multiple input multiple output (MIMO) systems, maximizing downlink capacity relies on designing a precoding matrix that achieves high beamforming gain and effectively suppresses multi-user ...
ZHANG Dekun, BAI Baoming
doaj  

Combining Channel Output Feedback and CSI Feedback for MIMO Wireless Systems

, 2010
The paper has been withdrawn and merged with arXiv:1104.2861 to avoid ...
Agrawal, Mayur, Love, David J., Balakrishnan, Venkataramanan   +2 more
openaire   +2 more sources

Research on CSI feedback of RIS-assisted massive MIMO system based on manifold learning

物联网学报
To solve the problem of high feedback overhead in a multi-user massive multiple-input multiple-output (MIMO) system assisted by a reconfigurable intelligent surface (RIS) in frequency-division duplexing (FDD) mode, a channel state information (CSI ...
QIAN Mujun, YU Shunchi, LIU Chen, SONG Yunchao, LU Feng   +4 more
doaj  

Lightweight Neural Network With Knowledge Distillation for CSI Feedback

IEEE Transactions on Communications
Deep learning has shown promise in enhancing channel state information (CSI) feedback. However, many studies indicate that better feedback performance often accompanies higher computational complexity. Pursuing better performance-complexity tradeoffs is crucial to facilitate practical deployment, especially on computation-limited devices, which may ...
Yiming Cui, Jiajia Guo, Zheng Cao, Huaze Tang, Chao-Kai Wen, Shi Jin, Xin Wang, Xiaolin Hou   +7 more
openaire   +2 more sources

Downlink transmit beamforming in TDD-MIMO systems

Tongxin xuebao, 2009
Concerning the access terminals （AT） use single antenna to transmit, two precoding methods were proposed for TDD systems that combined instantaneous CSI and statistical CSI effectively. When without feedback, instant perfect CSI was utilized to the most,
XU Dao-feng 1, YANG Lv-xi1
doaj   +2 more sources

Robust CSI feedback for high user velocity

, 2014
El trabajo realizado consiste en mejorar las comunicaciones en escenarios a alta velocidad donde las características del canal sufren un deterioro significante, debido a una débil correlación temporal del canal y a una elevada latencia en el feedback de información desde el usuario hacia la estación base.
Portolés Colón, Laura, Rupp, Markus
openaire   +1 more source