Results 261 to 270 of about 12,863 (308)

Channel and Crustal Rayleigh Waves

Geophysical Journal International, 1972
Summary For a structure containing even a slight low-velocity channel in the upper mantle, the collection of higher mode Rayleigh waves decomposes naturally into a family of LVC channel waves and a family of crustal waves. Only the fundamental mode and the crustal waves need be considered as exciting Rayleigh waves significantly, since the channel ...
G. F. Panza, F. A. Schwab, L. Knopoff
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Channel parameter estimation in Rayleigh fading channel

Electronics and Communications in Japan (Part III: Fundamental Electronic Science), 2005
In wireless communication environments such as indoors and in a relatively narrow region for which applications have recently started, the information transmission speed is sufficiently faster than the fading variation. In such cases, the fading variation can be viewed as a colored probability process with autocorrelation.
Hirohisa Gambe, Kenji Yokoyama, Miyoshi Saito, Kiyomichi Araki   +3 more
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MIMO rayleigh-product channels with co-channel interference

IEEE Transactions on Communications, 2009
This paper presents an analytical performance investigation of an interference-limited double scattering multiple-input multiple-output (MIMO) channel employing optimum combining. Our main contribution is the derivation of the closed-form expressions for the cumulative distribution function (c.d.f.) and probability density function (p.d.f.) of the ...
null Caijun Zhong, null Shi Jin, null Kai-kit Wong   +2 more
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Multiuser scheduling over rayleigh fading channels

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004
Forthcoming wideband wireless systems are supposed to support services with loose delay requirements, which allows for scheduling of data. In this work we investigate fast transmission scheduling for downlink CDMA over a Rayleigh fading channel.
F. Berggren, R. Jantti
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Measurement Complexity of Rayleigh Fading Channels

IEEE Transactions on Vehicular Technology, 2009
Rayleigh fading is a widely used channel model in wireless communications. The mean channel power is of practical importance in channel access, power control, handoff, modeling, and coverage analysis of wireless systems. A fundamental problem naturally arises: How many measurements are sufficient to estimate these parameters with the prescribed margin ...
null Xinjia Chen, null Guoxiang Gu, null Kemin Zhou   +2 more
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Capacity of correlated MIMO Rayleigh channels

IEEE Transactions on Wireless Communications, 2006
Abstract-This paper presents some exact results on the capacity of multiple-input-multiple-output (MIMO) channels subject to correlated Rayleigh fading when perfect channel state information (CSI) is known at the receiver. The authors focus on the semicorrelated scenario in which correlation exists either at the transmitter or at the receiver., They ...
M. Kang, M.S. Alouini
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Reliable data transmission over Rayleigh channel

2010 IEEE International Conference on Software Engineering and Service Sciences, 2010
This paper is an overview to the field of error control coding for reliable transmission in a communication system. This work presents the Convolutional code that makes up a reliable communication system, then examine its performance over Rayleigh transmission channel.
Yousef Hwegi, Hakim Kordi
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Optimized Selection Diversity for Rayleigh Fading Channels

IEEE Transactions on Communications, 1982
This paper considers the choice of the number of diversity branches for minimizing the bit error rate of a selection diversity system using noncoherent binary frequency-shift keying modulation for transmission over a Rayleigh fading Gaussian channel. An exact expression for the optimum number of branches, L_{sel}^{\ast} , is given.
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An OFDM Rayleigh Fading Channel Simulator

IEEE Vehicular Technology Conference, 2006
Several models have been proposed for the simulation of Rayleigh fading channels. However, existing simulators lack to properly consider the correlation between the subchannels of an OFDM system. We use a recently developed cross-correlation function that describes both temporal and frequency correlation in order to generate channel parameters.
Saeed Moradi, Saeed Gazor
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