Results 141 to 150 of about 2,369 (180)

Nonlinear equalization for Rician multipath fading channel

2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03)., 2004
We present a nonlinear equalization scheme for a Rician multipath fading channel - a fuzzy logic-based approach. We show that each channel state of a multipath Rician channel follows a Gaussian distribution, which means a Bayesian equalization can be implemented.
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Modulation classification in fading multipath channel

Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002., 2003
A system for modulation classification in a dispersive communication channel is developed. The channel equalizer and symbol rate are blindly estimated from data. The features used for recognition include cumulants and moments computed from a polar coordinate representation of the IQ-plane.
J. Venalainen, L. Terho, V. Koivunen
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Multipath fading of on-body propagation channels

2008 IEEE Antennas and Propagation Society International Symposium, 2008
It was shown that multipath fading of an on-body channel can be characterized by a Rician distribution. The parameters of the Rican distribution for two on-body channels were extracted and their behavior during walking movement in an office and in an anechoic chamber was analyzed.
Y.I. Nechayev, P.S. Hall
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Capacity of Nakagami multipath fading channels

1997 IEEE 47th Vehicular Technology Conference. Technology in Motion, 2002
We study the capacity of Nakagami multipath fading (NMF) channels with an average power constraint for three power and rate adaptation policies. We obtain closed-form solutions for NMF channel capacity (with and without diversity) for each power and rate adaptation strategy, and compare them with the additive white Gaussian noise (AWGN) channel ...
M.-S. Alouini, A. Goldsmith
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Receiver structures for fading multipath channels

Proceedings of IEEE Pacific Rim Conference on Communications Computers and Signal Processing, 2002
A model for a fading multipath channel based on an inhomogeneous Poisson process for the multipath delays is introduced. This model is well structured and quite flexible for characterization of mobile and indoor radio environments. A Bayesian decision approach is employed for the derivation of the optimal receiver for this channel model with additive ...
N. Abboud, H. Leib
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On channel estimation for RAKE receiver in a mobile multipath fading channel

Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 2002
Multipath fading is one of the major practical concerns in wireless communications. Multipath problem always exists in the mobile environment, especially for a mobile unit which is often embedded in its surroundings. The RAKE receiver has been used to reduce the multipath fading in a wideband spread spectrum mobile system.
Fu Li, Heng Xiao, Jin Yang
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Performance of orthogonal multi-carrier CDMA in a multipath fading channel

1994 IEEE GLOBECOM. Communications: The Global Bridge, 1996
A DS-CDMA multi-carrier system is proposed. The transmitted data bits are serial to parallel converted to a number of parallel branches. Each bit on each branch is DS-SS modulated and transmitted with a number of orthogonal and overlapping carriers. Given that sufficient interleaving is provided, this procedure provides many advantages.
Essam A. Sourour, Masao Nakagawa
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On the number of pilots for OFDM system in multipath fading channels

2004 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2004
The orthogonal frequency division multiplexing (OFDM) system has been demonstrated to be effective in a frequency selective multipath fading environment. To compensate the deleterious effects of the fading channels, pilot symbol assisted modulation (PSAM) technique has been used to obtain the channel estimate.
Wei Zhang 0001, Xiang-Gen Xia 0001, P. C. Ching, Wing-Kin Ma   +3 more
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A single-FPGA multipath MIMO fading channel simulator

2008 IEEE International Symposium on Circuits and Systems (ISCAS), 2008
We present an accurate model for compact implementations of Rayleigh and Rician fading channels. Verification of the proposed fading simulator is performed by comparing the simulated statistics with those of the ideal reference models. A parameterizable field-programmable gate array (FPGA) implementation of the channel simulator is presented.
Amirhossein Alimohammad 0001, Saeed Fouladi Fard, Bruce F. Cockburn, Christian Schlegel   +3 more
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Robust detection in asynchronous CDMA multipath fading channels

1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258), 1999
This paper presents a robust detection approach in the presence of transmission delay estimation errors in asynchronous CDMA frequency selective Rayleigh fading channels. The transmission delays in asynchronous channels need to be estimated in practice and are subject to estimation errors, which may cause severe performance degradation for most ...
Yong-Suk Moon, Mostafa Kaveh, Laurie B. Nelson   +2 more
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