Results 251 to 260 of about 645,324 (291)
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Instability of Flat Bed in Alluvial Channels
Journal of the Hydraulics Division, 1969THE OCCURRENCE OF DIFFERENT BED FORMS HAS BEEN CONSIDERED AS AN INSTABILITY IN THE FLAT BED FLOW. A GENERAL FUNCTIONAL RELATIONSHIP HAS BEEN DEVELOPED FOR THE INSTABILITY OF FLAT BED WHEN IT IS REPLACED BY EITHER DUNES OR RIPPLES. THE EXPERIMENTS INDICATE THAT TWO DISTINCT RELATIONSHIPS EXIST FOR THE TWO INSTABILITIES.
Harry M. Hill +2 more
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Multiuser detection in flat fading non-Gaussian channels
IEEE Transactions on Communications, 2002This paper deals with the problem of multiuser detection in direct-sequence code-division multiple-access (CDMA) fading channels with impulsive noise. This issue arises in practical situations because in many realistic wireless channels, the ambient channel noise is impulsive, resulting from various natural and man-made impulsive sources.
H. Vincent Poor, Mario Tanda
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Nonuniform Flow in Flat Rectangular Channels
Journal of the Hydraulics Division, 1971NONUNIFORM FLOW IS POSSIBLE IN FLAT OPEN CHANNELS AND THE SURFACE PROFILE OF FLOW IN SUCH A CHANNEL IS ALWAYS IN THE FORM OF A BACKWATER CURVE. THE PRESENT PRACTICE FOR BACKWATER PROFILE COMPUTATIONS EITHER NEEDS EXPENSIVE COMPUTER TIME OR IT EMPLOYS A VERY TEDIOUS MANUAL TRIAL AND ERROR METHOD.
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Flat-Vee Weirs in Alluvial Channels
Journal of the Hydraulics Division, 1971Sediment tests were carried out with the ultimate aim of providing design data for flat-vee weir installations in alluvial channels. The model study was of an idealized nature but did serve to indicate those variables which are important and the type of conditions where shoaling in the approach channel is likely to occur.
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Optimal Skewed Data Allocation on Multiple Channels with Flat Broadcast per Channel
IEEE Transactions on Computers, 2005Broadcast is an efficient and scalable way of transmitting data to an unlimited number of clients that are listening to a channel. Cyclically broadcasting data over the channel is a basic scheduling technique, which is known as flat scheduling. When multiple channels are available, a data allocation technique is needed to assign data to channels ...
Elia Ardizzoni +5 more
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Robust channel estimation for MIMO systems in flat fading channels
2004 International Conference on Communications, Circuits and Systems (IEEE Cat. No.04EX914), 2004In wireless communication systems, the ambient channel noise is known through experimental measurements to be decidedly non-Gaussian, due largely to impulse phenomena. It is known, too, that when data are contaminated by non-Gaussian noise, the conventional MMSE channel estimation method may perform poorly.
null Wei Bai +2 more
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Adaptive turbo-coded modulation for flat-fading channels
IEEE Transactions on Communications, 2003We consider a turbo-coded system employed on a flat-fading channel where the transmitter and receiver adapt the encoder, decoder, modulation scheme, and transmit power to the state of the channel. Assuming instantaneous and error-free channel gain and phase knowledge at the transmitter and the receiver, we determine the optimal adaptation strategy that
Sriram Vishwanath, Andrea Goldsmith
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The performance of an automatic aircraft identification in flat fading channels
2016 11th International Conference on Intelligent Systems: Theories and Applications (SITA), 2016In this paper, the performance of an automatic aircraft identification system is investigated in aeronautical flat fading channels. The automatic aircraft identification is achieved by means of spread-spectrum watermarking techniques. Due to its better resistance to fading environments, Orthogonal Frequency Division Multiplexing (OFDM) is used to ...
Sara Sekkate +2 more
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A Flat Channel System for Imaging Purposes
1972Publisher Summary This chapter provides an overview of a flat channel system for imaging purposes. The chapter describes briefly the results of measurements designed to show how the electrons are focused in the region of holes etched in a metal foil.
V. Jareš, M. Dvořák
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