Results 221 to 230 of about 381,489 (261)

Channel Measurements and Channel Traces

2016
Channel properties and characteristics of real cellular mobile networks are investigated in this chapter. The conducted measurements serve the purpose of a) highlighting the properties of cellular networks in order to design a novel congestion control protocol and b) collecting channel traces to emulate real network behavior in a simulated environment.
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Measurements and Consistent Families of Quantum Channels

Open Systems & Information Dynamics, 2011
This article introduces the notion of consistent families (Λ(n))n≥1of quantum channels. These families correspond to simultaneous observation of different copies of a given quantum system. Here, we are primarily interested in the analysis of measurements connected with them.
Yves Le Jan, Rolando Rebolledo
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Calibration of the measurement channels of measuring instruments

Measurement Techniques, 2011
Questions related to establishing the traceability of the measurement channels of measuring instruments are considered.
A. A. Danilov, Yu. V. Kucherenko, T. A. Fedoseeva   +2 more
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Channeling measurements methodology

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1993
Abstract A complete set of methods for channeling measurements is presented. It is based on a full discussion of transformations between laboratory and crystal frames of reference. Specific methods include crystal orientation and goniometer calibration procedure, beam-goniometer misalignment analysis, beam alignment along an arbitrary ...
A. Dygo, W.N. Lennard, I.V. Mitchell
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Drug-ionic channel interactions: Single-channel measurements

Annals of Neurology, 1984
Ionic channels of excitable membranes are the basic site where ionic fluxes take place during the generation of action potentials. A variety of natural toxins, chemicals, and therapeutic drugs have been found to modify the gating kinetics of the Na+ channels, thereby altering the excitation pattern.
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Channel-Adaptive Random Access With Discontinuous Channel Measurements

IEEE Journal on Selected Areas in Communications, 2016
Channel-adaptive random access is proposed to reduce the required transmission power for random access in TDD-based wireless systems. With channel-adaptive random access, a remote station measures the channel state of the downlink, estimates the channel state of the corresponding uplink based on the downlink measurement, and transmits a random access ...
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Measurement-Based Channel Management in WLANs

2010 IEEE Wireless Communication and Networking Conference, 2010
Wireless frequency resources are often the limit-ing factor for WLAN throughput. Hence, wireless channel management is needed to mitigate co-channel interference and improve channel reuse efficiency in WLANs, particularly in those with high-density access point deployment.
Yongqiang Liu, William Wu, Bo Wang, Tao He, Su Yi, Yong Xia 0007   +5 more
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Channel Measurement and Modeling

2017
The wireless channel model is a deterministric or stochastic numerical description of physical propagation enviroments based on channel measurement or analysis and simulation on the basis of propagation theories. It provides an effective and simple means to approximately express the channel characteristics of the wireless transmission.
Yang Yang, Jing Xu, Guang Shi, Cheng-Xiang Wang   +3 more
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Equalisation of Measured Optical MIMO Channels

Proceedings of the 5th International Conference on Optical Communication Systems, 2014
Within the last years multiple-input multiple-output (MIMO) transmission has reached a lot of attention in the optical fibre community. Theoretically, the concept of MIMO is well understood. However, practical implementations of optical components are in the focus of interest for further computer simulations.
André Sandmann, Andreas Ahrens, Steffen Lochmann   +2 more
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Parallel MIMO Channel Measurement Architecture

2009 Seventh Annual Communication Networks and Services Research Conference, 2009
Optimal methods of developing Multiple-Input Multiple- Output (MIMO) systems have been an active area of interest in recent communications research. This technology enables wireless communication systems to achieve higher data rates with good bit error rate (BER) and signal-to-noise ratio (SNR) performance, but at the expense of added system complexity
Wesley Miller, Brent R. Petersen, Bruce G. Colpitts   +2 more
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