Results 141 to 150 of about 1,386 (158)

Belief Propagation for Coded Multiuser Detection

2006 IEEE International Symposium on Information Theory, 2006
In this paper a simplified parallel belief propagation (BP) algorithm is suggested as a suboptimal soft-input soft-output multiuser detector in an iterative multiuser decoding scheme. The iterative decoding scheme itself is based on applying an outer BP algorithm for message passing between the BP multiuser detector and the single-user decoders.
Peng Tan, Lars Rasmussen
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Blind multiuser detection: a subspace approach

IEEE Transactions on Information Theory, 1998
Summary: A new multiuser detection scheme based on signal subspace estimation is proposed. It is shown that under this scheme, both the decorrelating detector and the linear minimum mean-square-error (MMSE) detector can be obtained blindly, i.e., they can be estimated from the received signal with the prior knowledge of only the signature waveform and ...
Wang, Xiaodong, Poor, H. Vincent
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Constrained minimum-BER multiuser detection

IEEE Transactions on Signal Processing, 1999
A new linear multiuser detector that directly minimizes the bit-error rate (BER) subject to a set of reasonable constraints is proposed. It is shown that the constrained BER cost function has a unique global minimum. This allows us to develop an efficient Newton barrier method for finding the coefficients of the proposed detector using information ...
X.F. Wang, W.-S. Lu, A. Antoniou
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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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Constrained Adaptive Linear Multiuser Detection Schemes

Journal of VLSI signal processing systems for signal, image and video technology, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Iterative nonlinear MMSE multiuser detection

1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258), 1999
This paper introduces the notion of nonlinear MMSE multiuser detection and shows that MMSE signal estimates followed by single user detectors yield MAP (or minimum probability of error) decisions for CDMA signals. Iterative solutions are proposed for nonlinear MMSE estimation.
S. Gollamudi, null Yih-Fang Huang
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Adaptive maximum likelihood multiuser detection

2000 IEEE International Symposium on Information Theory (Cat. No.00CH37060), 2002
An optimal multiuser detector, in the weighted least squares sense, is derived for code division multiple access (CDMA) and space division multiple access (SDMA) systems.
D.K. Borah, P.B. Rapajic
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Noncoherent decision-feedback multiuser detection

IEEE Transactions on Communications, 2000
The problem of noncoherent multiuser detection for multipulse modulation over the Gaussian multiuser channel is studied. It is assumed that neither the energies nor the carrier phases of the signals of any of the users are available at the receiver. Previously, a post-decorrelative generalized likelihood ratio test (GLRT) based detector was proposed as
M.K. Varanasi, D. Das
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Nonlinear group-blind multiuser detection

IEEE Transactions on Communications, 2001
Summary: 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 ...
Spasojević, Predrag, Wang, Xiaodong, Høst-Madsen, Anders   +2 more
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Multiuser detection:

Annales Des Télécommunications, 1999
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