نتایج جستجو برای: duplexing mode

تعداد نتایج: 223712  

2002
Tri T. Ha

With a growing number of consumers utilizing the Internet, companies have foreseen a consumer demand for high-speed wireless access. Since current mobile cellular systems can transfer at most 115.2 kbps per user, a third generation of mobile cellular service has been under development by various organizations since 1997. This new generation of technology will support data rates up to 2 Mbps for...

Journal: :CoRR 2017
Dalin Zhu Junil Choi Robert W. Heath

In this paper, a novel two-dimensional super-resolution angle-of-departure (AoD) and angle-ofarrival (AoA) estimation technique is proposed for wideband millimeter-wave multiple-input multipleoutput systems with cross-polarized antenna elements. The key ingredient of the proposed method is to form custom designed beam pairs, and devise an invertible function of the AoD/AoA to be estimated from ...

Journal: :anesthesiology and pain medicine 0
mohammadreza ghodrati anesthesia department, firoozgar hospital, iran university of medical sciences, tehran, iran alireza pournajafian anesthesia department, firoozgar hospital, iran university of medical sciences, tehran, iran; firoozgar hospital, iran university of medical sciences, tehran, iran. tel: +98-2188946762, fax: +98-2188942622 ali khatibi anesthesia department, firoozgar hospital, iran university of medical sciences, tehran, iran mohammad niakan anesthesia department, rasoul akram hospital, iran university of medical sciences, tehran, iran mohammad hosein hemadi anesthesia department, firoozgar hospital, iran university of medical sciences, tehran, iran mohammad mahdi zamani anesthesia department, firoozgar hospital, iran university of medical sciences, tehran, iran

results sixty patients were involved in this study. in asv mode, values including peak airway pressure (p-peak), end-tidal carbon dioxide (etco2), tidal volume and respiratory dead space were significantly lower than simv mode. although the mean value for dynamic compliance had no significant difference in the two types of ventilation, it was better in asv mode. methods in a crossover study, pa...

Journal: :IEEE Transactions on Wireless Communications 2022

We propose a comprehensive scheme for realizing massive multiple-input multiple-output (MIMO) system with dual-polarized antennas in frequency division duplexing (FDD) mode. Dual-polarized arrays are commonly employed due to the favorable property that, principle, they can double number of channel spatial degrees freedom less-than-proportional increase array size. However, processing MIMO is de...

Journal: :asia oceania journal of nuclear medicine and biology 0
hideo onishi program in health and welfare, graduate school of comprehensive scientific research, prefectural university of hiroshima norikazu matsutomo department of radiology, kurashiki central hospital yoshiharu kangai program in biological system sciences, graduate on school of comprehensive scientific research, prefectural university of hiroshima tatsunori saho program in health and welfare, graduate school of comprehensive scientific research, prefectural university of hiroshima hizuru amijima department of nursing,hyogo university of health sciences

objective(s): a novel iq-specttm method has become widely used in clinical studies. the present study compares the quality of myocardial perfusion images (mpi) acquired using the iq-specttm (iq-mode),conventional (180° apart: c-mode) and l-mode (90° apart: l-mode) systems. we assessed spatial resolution, image reproducibility and quantifiability using various physical phantoms. materials and me...

2004
Jingxin Chen

In presenting this thesis in partial fulfillment of the requirements for a Postgraduate degree from the University of Saskatchewan, the author agrees that the Libraries of this University may make it freely available for inspection. The author further agree that permission for copying of this thesis in any manner, in whole or in part, for scholarly purposes may be granted by the professor who s...

Journal: :Europan journal of science and technology 2022

Massive Multiple Input Output (MIMO) is a promising technology for meeting the demand of high data capacity mobile networks in future. Obtaining channel state information (CSI) MIMO systems provides energy and spectrum efficiency. Hence, accuracy CSI very important. Time Division Duplexing (TDD) good alternative method to obtain systems. Pilot sequences are used CSI. In practice, it not possibl...

Journal: :the modares journal of electrical engineering 2015
mohammad reza soltanpour pooria otadolajam mahmoodreza soltani

in this paper, an optimal adaptive fuzzy integral sliding mode control is presented to control the robot manipulator position tracking in the presence of uncertainties and permanent magnet dc motor. in the proposed control, sliding surface of the sliding mode control is defined according to the information of position tracking error, derivatives, and error integral. in order to estimate bounds ...

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