Results 1 to 10 of about 11,447 (223)
A Comparison of TDD and FDD Massive MIMO Systems Against Smart Jamming
IEEE Access, 2020 Frequency division duplex (FDD) massive multiple-input multiple-output (MIMO) systems introduce a large overhead in downlink channel estimation in contrast to the time division duplex (TDD) mode.
S Mohammad Razavizadeh +2 more
exaly +4 more sources
Learning the CSI Recovery in FDD Systems [PDF]
IEEE Transactions on Wireless Communications, 2021 We propose an innovative machine learning-based technique to address the problem of channel acquisition at the base station in frequency division duplex systems.
W. Utschick +4 more
semanticscholar +3 more sources
FDD Massive MIMO Without CSI Feedback [PDF]
IEEE Transactions on Wireless Communications, 2023 Transmitter channel state information (CSIT) is indispensable for the spectral efficiency gains offered by massive multiple-input multiple-output (MIMO) systems.
Deokhwan Han, Jeonghun Park, N. Lee
semanticscholar +3 more sources
Pathological mechanisms of motor dysfunction in familial Danish dementia: insights from a knock-in rat model [PDF]
Journal of NeuroinflammationFamilial Danish Dementia (FDD) is a rare autosomal dominant neurodegenerative disorder caused by a mutation in the integral membrane protein 2B (ITM2b) gene.
Arnab Choudhury +8 more
doaj +2 more sources
A Resource Allocation Scheme in Half Duplex FDD (H-FDD) Systems for M2M Communications
IFAC Postprint Volumes IPPV / International Federation of Automatic Control, 2013 Abstract Machine to machine (M2M) communications among machines without human intervention have attracted more and more prominence due to high market potential in the near future. In this article, we propose a heuristic algorithm of allocating weighted per-user data rates for half duplex frequency division duplexing (H-FDD), and show how much ...
Jihwan Choi, Ji-Woong Choi
exaly +2 more sources
Numerical Assessment of Building Vibration Techniques Using Laboratory Models [PDF]
Port Said Engineering Research Journal, 2022 Experimental Modal Analysis (EMA) is one of the most attractive engineering fields nowadays, which specifies in the studies of modal parameters of existing small buildings under forced vibrations.
moataz Elrayes +2 more
doaj +1 more source
Deep-Learning-Based Physical-Layer Secret Key Generation for FDD Systems [PDF]
IEEE Internet of Things Journal, 2021 Physical-layer key generation (PKG) establishes cryptographic keys from highly correlated measurements of wireless channels, which relies on reciprocal channel characteristics between uplink and downlink, is a promising wireless security technique for ...
Xinwei Zhang +5 more
semanticscholar +1 more source
A Partial Reciprocity-based Channel Prediction Framework for FDD Massive MIMO with High Mobility [PDF]
IEEE Transactions on Wireless Communications, 2022 Massive multiple-input multiple-output (MIMO) is believed to deliver unrepresented spectral efficiency gains for 5G and beyond. However, a practical challenge arises during its commercial deployment, which is known as the “curse of mobility”.
Ziao Qin +4 more
semanticscholar +1 more source
A Partial Channel Reciprocity-Based Codebook for Wideband FDD Massive MIMO [PDF]
IEEE Transactions on Wireless Communications, 2022 The acquisition of channel state information (CSI) in Frequency Division Duplex (FDD) massive MIMO has been a formidable challenge. In this paper, we address this problem with a novel CSI feedback framework enabled by the partial reciprocity of uplink ...
Haifan Yin, D. Gesbert
semanticscholar +1 more source
The effect of photobiomodulation on the brain during wakefulness and sleep
Frontiers in Neuroscience, 2022 Over the last seventy years or so, many previous studies have shown that photobiomodulation, the use of red to near infrared light on body tissues, can improve central and peripheral neuronal function and survival in both health and in disease.
Cecile Moro +11 more
doaj +1 more source