Results 151 to 160 of about 3,134,060 (181)

Blind MMSE-Constrained Multiuser Detection

IEEE Transactions on Vehicular Technology, 2008
In this paper, blind multiuser detection is studied for a direct-sequence (DS) code-division multiple access (CDMA) system with unknown multipath channels. The receiver is designed to follow a minimum mean-square-error (MMSE) form parameterized by a channel-like constraint vector, which is then optimized by the conventional constant modulus algorithm ...
Ping Liu 0003, Zhengyuan Xu
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Blind and group-blind multiuser detection in colored noise

WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466), 2003
The problem of adaptive suppression of both multiple-access interference (MAI) and intersymbol interference (ISI) in a dispersive CDMA channel is considered. A subspace-based group-blind technique for this purpose is developed, which blindly suppresses the interfering signals from other cells, while jointly detects the signals within the cell of ...
Xiaodong Wang 0001, Anders Høst-Madsen
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Blind Multiuser Detection by Kurtosis Maximization/Minimization

IEEE Signal Processing Letters, 2004
Blind multiuser detection is studied in the presence of multipath distortion. The kurtosis of the receiver's output is minimized with respect to the receiver's parameters subject to multiple linear constraints. The constraints are dependent on the spreading codes of the user of interest.
Zhengyuan Xu, Ping Liu 0003
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Blind Multiuser Detection Based on Power Estimation

IEICE Transactions on Communications, 2005
Although the multiuser detection scheme based on Kalman filtering (K-MUD) proposed by Zhang and Wei, is referred to as a blind algorithm, in fact it is not really blind because it is conditioned on perfect knowledge of system parameter, power of the desired user.
Guanghui Xu, Guangrui Hu
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The cross-entropy method for blind multiuser detection

International Symposium onInformation Theory, 2004. ISIT 2004. Proceedings., 2004
We consider the problem of blind multiuser detection. We adopt a Bayesian approach where unknown parameters are considered random and integrated out. Computing the maximum a posteriori estimate of the input data sequence requires solving a combinatorial optimization problem.
Zaifei Liu, Arnaud Doucet, Sumeetpal S. Singh   +2 more
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Blind Multiuser Detection for Ultra Wideband System

2009 Third International Conference on Genetic and Evolutionary Computing, 2009
Based on the CMA, a proved blind multiuser detection, which combined with the multistage wiener filter(MSWF) for UWB systems in a realistic indoor channel is proposed in this paper. This new algorithm had a low computational complexity without the computation of matrix inverse.
Zhengqiang Wang, Ling-yuan Li, Lixin Song   +2 more
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Blind Multiuser Detection: FromMOE to Subspace Methods

IEEE Transactions on Signal Processing, 2004
The minimum output energy (MOE) multiuser receiver has been shown to approach the minimum mean-square-error (MMSE) receiver at high signal-to-noise ratio (SNR). However, performance degradation is incurred by noise induced channel estimation error. In this paper, we propose a Power of R (POR) technique to significantly improve the performance of the ...
Zhengyuan Xu, Ping Liu 0003, Xiaodong Wang 0001   +2 more
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Maximum likelihood blind multiuser detection

Proceedings of the IEEE Signal Processing Workshop on Higher-Order Statistics. SPW-HOS '99, 2003
Code division multiple access (CDMA) is the most promising candidate to implement the wireless multiple access scheme of third-generation mobile communication systems. This paper introduces a new blind approach to multiuser detection in time-dispersive channels.
J. Miguez, L. Castedo
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Implementing ICA in blind multiuser detection

IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004., 2005
This paper introduces a blind multiuser detection algorithm for MIMO channels. The receiver is required to separate and recover the information signal of the desired user(s) based on independent component analysis (ICA) of the received sequence. The received sequence is assumed to be independent identically distributed.
Leong, W. Y., Homer, J. P.
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Blind Multiuser Detection Based on Kernel Approximation

2006
A kernel based multiuser detection (MUD) scheme in code-division multiple-access (CDMA) system is proposed. In this scheme, the support vector (SV) under support vector (SVM) framework is obtained through a kernel sparsity approximation, which regulates the kernel width parameter via a heuristic approach to obtain an approximate equivalent SV.
Tao Yang 0008, Bo Hu 0002
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