Results 81 to 90 of about 11,447 (223)

Performance Analysis of Channel Extrapolation in FDD Massive MIMO Systems [PDF]

IEEE Transactions on Wireless Communications, 2019
Channel estimation for the downlink of frequency division duplex (FDD) massive multiple-input-multiple output (MIMO) systems is well known to generate a large overhead as the amount of training generally scales with the number of transmit antennas in a ...
François Rottenberg, Thomas Choi, Peng-Ju Luo, C. Zhang, A. Molisch   +4 more
semanticscholar   +1 more source

Mobility‐Restricting Covenants in Business Contracts: The Case of Franchising

Journal of Empirical Legal Studies, EarlyView.
ABSTRACT Several studies show that restrictive covenants in employment contracts, such as non‐compete agreements, may affect employees in detrimental ways, including by reducing mobility and suppressing wages. While such concerns are real, these clauses also have the potential to serve legitimate business purposes by helping companies protect valuable ...
Francine Lafontaine, Lorenzo G. Luisetto, J.J. Prescott   +2 more
wiley   +1 more source

External PIM Modeling in FDD MIMO

IEEE Access
In this paper, a physical approach is proposed to describe external (air-induced) passive intermodulation (PIM) for a frequency-division duplexing (FDD) multiple-input multiple-output (MIMO) system with an arbitrary number of transceiver chains. It is caused by metallic objects with nonlinear characteristics (“rusty bolt” effect) located ...
Stanislav Krikunov, Viacheslav V. Zemlyakov, Andrey Ivanov 0001   +2 more
openaire   +2 more sources

Economic policy uncertainty and international corporate leasing

Journal of Financial Research, EarlyView.
Abstract We examine the effect of economic policy uncertainty (EPU) on the corporate lease decision using an international sample of 19 countries. The use of operating leases increases when EPU is heightened. The documented leasing increase is more pronounced for financially constrained firms, firms facing greater operating volatility, or those that ...
Goutham Abotula, Douglas (DJ) Fairhurst, Yoonsoo Nam   +2 more
wiley   +1 more source

UL-CSI Data Driven Deep Learning for Predicting DL-CSI in Cellular FDD Systems

IEEE Access, 2019
Frequency division duplex (FDD) systems dominate current cellular networks due to its advantages of low latency and strong anti-interference ability.
Jie Wang, Ying Ding, Shujie Bian, Yang Peng, Miao Liu, Guan Gui   +5 more
semanticscholar   +1 more source

Channel Feedback Based on AoD-Adaptive Subspace Codebook in FDD Massive MIMO Systems [PDF]

IEEE Transactions on Communications, 2017
Channel feedback is essential in frequency division duplexing (FDD) massive multiple-input multiple-output (MIMO) systems. Unfortunately, prior work on multiuser MIMO has shown that the feedback overhead scales linearly with the number of base station ...
Wenqian Shen, Linglong Dai, B. Shim, Zhaocheng Wang, R. Heath   +4 more
semanticscholar   +1 more source

Optimal Portfolio Choice With Cross‐Impact Propagators

Mathematical Finance, EarlyView.
ABSTRACT We consider a class of optimal portfolio choice problems in continuous time where the agent's transactions create both transient cross‐impact driven by a matrix‐valued Volterra propagator, as well as temporary price impact. We formulate this problem as the maximization of a revenue‐risk functional, where the agent also exploits available ...
Eduardo Abi Jaber, Eyal Neuman, Sturmius Tuschmann   +2 more
wiley   +1 more source

Related issues of China Mobile LTE TDD/FDD fusion network

Dianxin kexue, 2015
The TD-LTE and LTE FDD fusion network is the trend of the future LTE network.With the further development of 4G network and the rdeuction of GSM network load,China Mobile will double existing GSM frequency resources for LTE FDD network construction.The ...
ANGZuyang W
doaj   +2 more sources

Phototherapies mediated by metallic nanoparticles and near‐infrared radiation in skin cancer: A systematic review

Photochemistry and Photobiology, EarlyView.
Recent studies demonstrate that near‐infrared (NIR—750–980 nm)‐mediated photodynamic (PDT) and photothermal (PTT) therapies, combined with metallic nanoparticles (MNPs), show promising results against skin cancer, particularly melanoma, in both in vitro and in vivo models.
Tamyris Devincenzi, Alessandra Costa Lopes, Marcelo Augusto Germani Marinho, Daza de Moraes Vaz Batista Filgueira   +3 more
wiley   +1 more source

On dimensionality loss in FDD massive MIMO systems [PDF]

2015 IEEE Wireless Communications and Networking Conference (WCNC), 2015
Dimensionality loss is defined as the channel estimation overhead, which results in a loss of time-frequency resources in pilot-assisted wireless systems. In this paper, the scaling result of dimensionality loss, i.e., the scaling factor, in frequency-division-duplex (FDD) massive multiple-inputmultiple-output(MIMO) downlinks is derived.
Zhiyuan Jiang, Sheng Zhou 0001, Zhisheng Niu   +2 more
openaire   +1 more source