Results 121 to 130 of about 215 (157)
Some of the next articles are maybe not open access.
Asymptotic Analysis of Blind Multiuser Detection with Blind Channel Estimation
IEEE Transactions on Signal Processing, 2004The analytical performance of the subspace-based blind linear minimum mean-square error (MMSE) multiuser detection algorithm in general multipath multi-antenna code-division multiple-access (CDMA) systems is investigated. In blind multiuser detection, the linear MMSE detector of a given user is estimated from the received signals, based on the ...
Xiaodong Wang, A Host-Madsen
exaly +2 more sources
Space-Time Blind Multiuser Detection for Multiuser DS-CDMA and Oversampled Systems
Wireless Personal Communications, 2010Novel space-time blind multiuser detection method for multiuser DS-CDMA and oversampled systems is presented. To achieve signal recovery, Khatri-Rao product structure of the space-time channel matrix of received signals and rank-1 projection strategy are exploited.
Xu Liu, Zong-ze Xu, Lei Lei
exaly +2 more sources
Blind multiuser detection for MC-CDMA with antenna array
Computers and Electrical Engineering, 2010We investigate the characteristics of the received signal as trilinear model for multi-carrier code division multiple access (MC-CDMA) system with antenna array, and propose a blind multiuser detection method for MC-CDMA system in this paper. The trilinear-based multiuser detection algorithm (Trilinear-MUDE) that we presented exploits the versatile ...
Xin Gao, Dazhuan Xu
exaly +2 more sources
Blind adaptive multiuser detection
GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005We propose a new blind multiuser signal model and detection framework for solving the near-far problem in synchronous CDMA in this paper. Compared with existing blind detectors, the proposed framework requires a minimum number of previously received signals, which is about the number of interfering users, and no sub-space separation or sequence ...
Shu Wang +7 more
openaire +1 more source
Blind widely linear multiuser detection
IEEE Communications Letters, 2000Widely linear structures for multiuser detection of code division multiple-access signals are proposed, which jointly elaborate the received signal and its complex conjugate. Computer simulations show that the new structures significantly outperform the conventional linear ones, in terms of suppression capability of both wideband multiple-access and ...
GELLI, GIACINTO +2 more
openaire +3 more sources
Nonlinear group-blind multiuser detection
IEEE Transactions on Communications, 2001Summary: A nonlinear group-blind technique is developed for joint detection of some given users' data in a CDMA uplink environment with the presence of unknown interference. This method performs the so-called ``slowest-descent search'' over a likelihood function of the desired users, starting from the estimate closest to the unconstrained maximizer of ...
Predrag Spasojevic +2 more
openaire +1 more source
Blind MMSE-Constrained Multiuser Detection
IEEE Transactions on Vehicular Technology, 2008In 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
openaire +1 more source
Blind and group-blind multiuser detection in colored noise
WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466), 2003The 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
openaire +1 more source
Blind Multiuser Detection by Kurtosis Maximization/Minimization
IEEE Signal Processing Letters, 2004Blind 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
openaire +1 more source
Blind Multiuser Detection Based on Power Estimation
IEICE Transactions on Communications, 2005Although 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
openaire +1 more source