Journal ArticleDOI
Performance analysis of minimum variance CDMA receivers
Michail Tsatsanis,Zhengyuan Xu +1 more
TLDR
It is shown that the performance of the proposed method tends to be close to that of the MMSE receiver at high SNR, whereas the constraint parameters converge to the multipath channel parameters.Abstract:
Constrained optimization of the receiver's output variance has previously been proposed as a relatively simple method for designing blind multiuser detectors for DS-CDMA systems. A single constraint is sufficient for the AWGN case, whereas multiple constraints should be used in a multipath environment. It is shown in this paper that the choice of the constraint parameters in the multipath case can have a significant effect on the system performance. A max/min approach for optimizing the constraint is proposed, resulting in blind solutions with improved performance. It is shown that the performance of the proposed method tends to be close to that of the MMSE receiver at high SNR, whereas the constraint parameters converge to the multipath channel parameters. The proposed method does not require knowledge of the interfering users' codes and timing. Simulation results support those performance claims.read more
Citations
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Proceedings Article
On the capacity of a cellular CDMA system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
TL;DR: It is concluded that properly augmented and power-controlled multiple-cell CDMA (code division multiple access) promises a quantum increase in current cellular capacity.
Journal ArticleDOI
Blind PARAFAC receivers for DS-CDMA systems
TL;DR: This paper links the direct-sequence code-division multiple access (DS-CDMA) multiuser separation-equalization-detection problem to the parallel factor (PARAFAC) model, which is an analysis tool rooted in psychometrics and chemometrics, and derives a deterministic blind PARAFAC DS- CDMA receiver with performance close to non-blind minimum mean-squared error (MMSE).
Journal ArticleDOI
Blind adaptive algorithms for minimum variance CDMA receivers
Zhengyuan Xu,Michail Tsatsanis +1 more
TL;DR: Adaptive solutions for joint, constrained optimization problem of blind multiuser receivers with low complexity and stochastic gradient and recursive least-square-type algorithms are developed.
Journal ArticleDOI
Adaptive techniques for multiuser CDMA receivers
TL;DR: An overview of previous work in MD with an emphasis on adaptive methods is provided, including (suboptimal) linear receivers and the data-aided MMSE receiver.
Journal ArticleDOI
Blind Adaptive Constrained Reduced-Rank Parameter Estimation Based on Constant Modulus Design for CDMA Interference Suppression
TL;DR: A multistage decomposition for blind adaptive parameter estimation in the Krylov subspace with the code-constrained constant modulus (CCM) design criterion is developed and the proposed techniques to the suppression of multiaccess and intersymbol interference in DS-CDMA systems are considered.
References
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Book
Multiuser Detection
TL;DR: This self-contained and comprehensive book sets out the basic details of multiuser detection, starting with simple examples and progressing to state-of-the-art applications.
Book
Multirate Systems and Filter Banks
TL;DR: In this paper, a review of Discrete-Time Multi-Input Multi-Output (DIMO) and Linear Phase Perfect Reconstruction (QLP) QMF banks is presented.
Journal ArticleDOI
Beamforming: a versatile approach to spatial filtering
B.D. Van Veen,K.M. Buckley +1 more
TL;DR: An overview of beamforming from a signal-processing perspective is provided, with an emphasis on recent research.
Journal ArticleDOI
On the capacity of a cellular CDMA system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
TL;DR: In this paper, the interference-suppression feature of CDMA (code division multiple access) can result in a many-fold increase in capacity over analog and even over competing digital techniques.
Proceedings Article
On the capacity of a cellular CDMA system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
TL;DR: It is concluded that properly augmented and power-controlled multiple-cell CDMA (code division multiple access) promises a quantum increase in current cellular capacity.