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Channel-Adaptive Random Access With Discontinuous Channel Measurements
IEEE Journal on Selected Areas in Communications, 2016Channel-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, 2010Wireless 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 +5 more
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Equalisation of Measured Optical MIMO Channels
Proceedings of the 5th International Conference on Optical Communication Systems, 2014Within 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 +2 more
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Parallel MIMO Channel Measurement Architecture
2009 Seventh Annual Communication Networks and Services Research Conference, 2009Optimal 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 +2 more
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Channel Measurement and Modeling
2017The 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 +3 more
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Measured characteristics of the MIMO wireless channel
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211), 2002This paper presents results from an experimental platform designed to measure the transfer matrix for indoor and outdoor multiple-input multiple-output (MIMO) channels with up to 16 transmit and receive antenna elements. Key aspects of the hardware system and data post-processing techniques are provided.
Jon W. Wallace, Michael A. Jensen
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Measurement results and analysis on a HBC channel
2014 IEEE International Symposium on Medical Measurements and Applications (MeMeA), 2014Human body communication (HBC) is a communication technology that uses the body of a person as a channel to propagate signals. Many characteristics of HBC present advantages over the most common radiation-based methods, which makes it an interesting alternative to implement the emergent body area networks.
Maicon Deivid Pereira +2 more
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Modeling and Measurement of MIMO Relay Channels
VTC Spring 2008 - IEEE Vehicular Technology Conference, 2008This paper proposes a relay channel model which takes into account the influence of relay location and antenna configuration. Simulation results show that when relay is in the line-of-sight (LOS) propagation environment, the channel capacity will degrade.
Lei Jiang 0005 +2 more
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Measurement of Time-Variant Linear Channels
IEEE Transactions on Information Theory, 2006The goal of channel measurement or operator identification is to obtain complete knowledge of a channel operator by observing the image of a finite number of input signals. In this paper, it is shown that the spreading support of the operator (that is, the support of the symplectic Fourier transform of the Kohn-Nirenberg symbol of the operator) has ...
Götz E. Pfander, D. F. Walnut
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Measurements on time-variant communication channels
IEEE Transactions on Information Theory, 1962We discuss the problems of making detailed measurements of instantaneous values and the statistical parameters of time-variant filters when observations are permitted at the filter terminals only. It appears that the product of the maximum time- and frequency-spreadings produced by the time-variant filter sets a limit on our ability to determine the ...
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