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A modified constrained constant modulus approach to blind adaptive multiuser detection
2001
IEEE Transactions on Communications
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An alternative blind adaptive multiuser detection is investigated based on modified constrained constant modulus (CM) criterion. ...
Index Terms-Blind multiuser detection, CDMA, constant modulus approach, multiple-access interference, stochastic gradient algorithm. ...
ACKNOWLEDGMENT The authors would like to thank anonymous reviewers whose comments have greatly enhanced the quality of this paper. ...
doi:10.1109/26.950350
fatcat:xfjzejidffb4beveplsyt3tida
Invasive weed optimization method based blind multiuser detection for MC-CDMA interference suppression over multipath fading channel
2010
2010 IEEE International Conference on Systems, Man and Cybernetics
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The paper presents a novel constrained constant modulus (CMA) approach for the blind suppression of multiuser interference in multi-carrier code division multiple access (MC-CDMA) systems. ...
In this paper, we put forward a novel receiver, which combines CMA blind adaptive multiuser detection with Invasive weed optimization (IWO) for MC-CDMA interference suppression over multipath fading channel ...
In order to overcome these shortages, a modified constant modulus algorithm was developed for blind multiuser detector. ...
doi:10.1109/icsmc.2010.5641667
dblp:conf/smc/HungCCH10
fatcat:yde5nja7x5gnvfkretivxr5a7y
Constrained Adaptive Constant Modulus RLS Algorithm for Blind DS-CDMA Multiuser Receiver under Time-Varying Channels
2007
IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences
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The performance of the blind multiuser detector for a DS-CDMA system with linearly constrained constant modulus (LCCM) criterion is known to highly depend on the exact knowledge of the desired user amplitude ...
proposed LC-ACM-RLS algorithm has better tracking capability compared with the conventional approaches. key words: DS-CDMA multiuser detector, constant modulus criterion, linearly constrained RLS algorithm ...
Also, we would like to thank the anonymous reviewers for their useful commends to enhance the quality of this paper. ...
doi:10.1093/ietfec/e90-a.7.1452
fatcat:opf4wglh3nhn5jixhfdwevy7di
Blind Adaptive MIMO Receivers for CDMA Systems with Space-Time Block-Codes and Low-Cost Algorithms
[article]
2014
arXiv
pre-print
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A space-time code-constrained constant modulus (CCM) design criterion based on constrained optimization techniques and low-complexity stochastic gradient (SG) adaptive algorithms are developed for estimating ...
A blind space-time channel estimation scheme for STBC systems based on a subspace approach is also proposed along with an efficient SG algorithm. ...
In this work we present blind adaptive linear MIMO receivers based on the code-constrained constant modulus (CCM) design for DS-CDMA systems using multiple transmit antennas and STBC in multipath channels ...
arXiv:1410.5510v1
fatcat:j2wyywysofav7jsoe6sm4qqcym
Interference rejection in digital wireless communications
1997
IEEE Signal Processing Magazine
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Rude and Griffiths [143] develop a fractionally spaced adaptive equalizer based on the linearly constrained constant-modulus (LCCM) algorithm. ...
Intersymbol Interference J / S . . . . . . . . . . . . . . . . . Jammer-to-Signal Ratio LCCM . . . . . . Linearly Constrained Constant Modulus LFSE. . . . . . . . . ...
doi:10.1109/79.587051
fatcat:sx5pmfgocrgjfoealxa7jg4wse
Performance Analysis Of A New Adaptive Algorithm For Blind Multiuser Detection
2002
Zenodo
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constant modulus approach to blind adaptive
multiuser interference suppression"IEEE Commun.
Letters, vol.2, no.8,pp.217-220, August 1998. ...
(constant modulus) error rate.
type algorithm for multiuser detection is proposed in [2]. ...
doi:10.5281/zenodo.54204
fatcat:lvfqfjrf7bdy5lirmgyyxfpkla
Blind adaptive interference suppression for direct-sequence CDMA
1998
Proceedings of the IEEE
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In this paper, we present recent developments in interference suppression using blind adaptive receivers that do not require knowledge of the signal waveforms and propagation channels of the interference ...
The capacity of DS-CDMA systems is interference-limited and can therefore be increased by techniques that suppress interference. ...
In particular, in the absence of noise, it is possible to choose a correlator along such that , which is constant modulus. ...
doi:10.1109/5.720252
fatcat:exsvogy7mvcvrfscq67bewtdou
Blind Adaptive Linear Parallel Interference Canceller for DS-CDMA in Frequency Selective Fading Channels
2006
2006 IEEE Ninth International Symposium on Spread Spectrum Techniques and Applications
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A code-constrained constant modulus (CCM) design criterion based on constrained optimization techniques is proposed for PIC detectors in scenarios subject to multipath, and computationally efficient blind ...
In this work we propose an adaptive blind linear parallel interference canceller (PIC) for direct-sequence code division multiple access (DS-CDMA) systems in frequency selective fading channels. ...
In this paper we introduce blind adaptive linear PIC detectors that employ algorithms based on the code-constrained constant modulus (CCM) criterion. ...
doi:10.1109/isssta.2006.311773
fatcat:746ntivqkfh5vasqsnyzrlnpqq
Blind Adaptive Interference Suppression Based on Set-Membership Constrained Constant-Modulus Algorithms With Dynamic Bounds
2013
IEEE Transactions on Signal Processing
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This work presents blind constrained constant modulus (CCM) adaptive algorithms based on the set-membership filtering (SMF) concept and incorporates dynamic bounds for interference suppression applications ...
(ISI) to address the important issue of bound specification in multiuser communications. ...
ACKNOWLEDGEMENT The second author is grateful for the financial support provided by CNPq, a Brazilian research council, and FAPERJ, a Rio de Janeiro state research funding agency. ...
doi:10.1109/tsp.2012.2229995
fatcat:a7bf7gt7s5drfowzzytjdosxsy
Chip-interleaved block-spread code division multiple access
2002
IEEE Transactions on Communications
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Filling the zero-gaps with known symbols allows for perfectly constant modulus transmissions. ...
A novel multiuser-interference (MUI)-free code division multiple access (CDMA) transceiver for frequency-selective multipath channels is developed in this paper. ...
The latter gives rise to multiuser interference (MUI). ...
doi:10.1109/26.983320
fatcat:nx5sz2poujf5zjqxmyrh7sv6u4
A constant modulus blind adaptive receiver for multiuser interference suppression
1998
Signal Processing
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In this paper we investigate the ability of the Constant Modulus (CM) criterion to adaptively suppress Multiple Access Interference (MAI) in Code Division Multiple Access (CDMA) channels without the need ...
Zusammenfassung In diesem Artikel untersuchen wir die Fa¨higkeit des Constant Modulus (CM) Kriteriums, Sto¨rungen zu unterdru¨cken, die durch vielfachen Benutzerzugriff (Multiple Access Interference, MAI ...
Keywords: Adaptive filtering; Constant modulus; CDMA; MAI suppression; Multiuser communications GH correlation coefficient of the ith and jth codes Notation
A
amplitude matrix
b
transmitted symbols ...
doi:10.1016/s0165-1684(98)00131-5
fatcat:eecwkctfy5bzriwsna2bxkjiii
Doubly Constrained Robust Blind Beamforming Algorithm
2013
Journal of Applied Mathematics
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We propose doubly constrained robust least-squares constant modulus algorithm (LSCMA) to solve the problem of signal steering vector mismatches via the Bayesian method and worst-case performance optimization ...
In contrast to the linearly constrained LSCMA, the proposed algorithm provides better robustness against the signal steering vector mismatches, yields higher signal captive performance, improves greater ...
Acknowledgments The authors would like to thank the anonymous reviewers for their insightful comments that helped improve the quality of this paper. ...
doi:10.1155/2013/245609
fatcat:hvmwad5jkrfmfiffqgrbi6vmci
A New Algorithm for Blind Adaptive Multiuser Detection in Frequency Selective Multipath Fading Channel
2004
IEEE Transactions on Wireless Communications
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This paper deals with a modified version of a blind adaptive multiuser detector for direct sequence code-division multiple-access (DS-CDMA) wireless communication systems which is named precombining blind ...
In particular, the PBA-MUD is based on a blind adaptive algorithm that allows the detector to avoid deep fading impairments and the cancellation of the desired signal due to signature sequence mismatch ...
BLIND ADAPTIVE MULTIUSER DETECTOR (BA-MUD) The well-known BA-MUD [1] is based on the minimization of average output energy subject to a constraint. ...
doi:10.1109/twc.2003.821205
fatcat:kyzwb3qhx5ckbhcowvys2lteki
Blind Adaptive Algorithms for Decision Feedback DS-CDMA Receivers in Multipath Channels
[article]
2013
arXiv
pre-print
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Code-constrained minimum variance (CMV) and constant modulus (CCM) design criteria for DF receivers based on constrained optimization techniques are investigated for scenarios subject to multipath. ...
against previously reported approaches. ...
Code-constrained minimum variance (CMV) and constant modulus (CCM) design criteria for DF receivers based on constrained optimization techniques are investigated for scenarios subject to multipath. ...
arXiv:1301.5006v1
fatcat:zowwqicvbjgyfnndvov7cmvya4
Beamforming techniques for massive MIMO systems in 5G: overview, classification, and trends for future research
2017
Frontiers of Information Technology & Electronic Engineering
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to improve system throughput and reduce intra-and inter-cell interference. ...
Massive multiple-input multiple-output (MIMO) systems combined with beamforming antenna array technologies are expected to play a key role in next-generation wireless communication systems (5G), which ...
: least square constant modulus algorithm; LCMV: linearly constrained minimum variance; MVDR: minimum variance distortionless response
Fig. 2 2 Adaptive beamforming (a) and switched beamforming (b)(b ...
doi:10.1631/fitee.1601817
fatcat:5kld5arndvfovazlghdbjuccka
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