Results 241 to 250 of about 645,324 (291)

Hidden Markov modeling of flat fading channels

IEEE Journal on Selected Areas in Communications, 1998
Hidden Markov models (HMMs) are a powerful tool for modeling stochastic random processes. They are general enough to model with high accuracy a large variety of processes and are relatively simple allowing us to compute analytically many important parameters of the process which are very difficult to calculate for other models (such as complex Gaussian
William Turin, Robert van Nobelen
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Droplet sorting in a loop of flat microfluidic channels

Journal of Physics: Condensed Matter, 2013
Motivated by recent experiments, we numerically study the droplet traffic in microfluidic channels forming an asymmetric loop with a long and a short arm. The loop is connected to an inlet and an outlet channel by two right angled T-junctions. Assuming flat channels, we employ the boundary element method (BEM) to numerically solve the two-dimensional ...
Kadivar, E., Herminghaus, S., Brinkmann, M.   +2 more
openaire   +3 more sources

Iterative B-spline channel estimation for fast flat fading channels

IEEE International Conference on Communications, 2005. ICC 2005. 2005, 2005
A novel B-spline iterative channel estimation technique over fast flat fading channels is proposed. Both local linear and parabolic splines are considered. The optimal sampling interval is found by simulations and then approximated by a simple equation.
Huiheng Mai, Yuriy V. Zakharov, Alister G. Burr   +2 more
openaire   +1 more source

Improved channel estimation over frequency-flat and rapid fading channels

2004 IEEE International Symposium on Circuits and Systems (ISCAS), 2004
This paper presents the improved technique for channel estimation in mobile radio environments. Conventionally, the symbol-aided techniques use only pilot symbols to estimate the fading process. However, the performance of those schemes will be poor in the severe fading environments.
Tae Jin Hwang, Heung Ki Baik
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Optimal multi-channel data allocation with flat broadcast per channel

18th International Parallel and Distributed Processing Symposium, 2004. Proceedings., 2004
Summary form only given. Broadcast 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.
Alan A. Bertossi, Maria Cristina Pinotti, Shashank Ramaprasad, RIZZI, ROMEO, Madhusudana V. S. Shashanka   +4 more
openaire   +2 more sources

Capacity and coding for flat fading channels without channel state information

IEEE Wireless Communications and Networking Conference, 2005, 2005
This paper presents a method for calculating arbitrarily tight upper and lower bounds on the capacity of a flat fading channel with M-ary inputs, where the fading process is modelled as a Gaussian random process with any spectral density. Neither the transmitter nor the receiver knows the channel state.
Teng Li 0008, Oliver M. Collins
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Inception of channelization over a non-flat bed.

2001
The paper deals with the upstream-driven theory for inception of channelization in the case of non-flat bed. St.-Venant steady equations of shallow water, written in terms of streamwise momentum, transverse momentum and mass balance, are integrated using a linear perturbative analysis in order to obtain the variation of the finite wavelength ...
REVELLI, Roberto, RIDOLFI, LUCA
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Channel estimation for space-time block codes in frequency-flat channels

2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2005
The paper addresses different approaches for flat fading channel estimation in the HSDPA/CDMA environment with multiple antennas. In particular, we compare semi-blind subspace and training-based channel estimation for orthogonal and non-orthogonal space-time block codes.
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Ribbed Flow from a Flat Channel

Nature Physical Science, 1973
DURING our study of the flow properties of fluids we have observed a ribbed surface on a viscoelastic fluid when it exited from a long, smooth, slit-like flow channel1. Fig. 1 shows an example of this phenomenon as such a fluid leaves the channel. The surface had the appearance of corduroy (cycloidal cross-section) and this unusual flow pattern was ...
ROGER E. ECKERT, EDWARD J. NOVOTNY
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MIMO Flat-Fading Channels

2011
In the present chapter, we extend the bounds on the achievable rate with i.d. input symbols given in Chapter 3 for the discrete-time flat-fading SISO channel to the MIMO case, including spatial antenna correlation. Beside the constraint on i.d. input symbols in temporal domain, as it has been also used in the SISO case, we furthermore do not optimize ...
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