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Multiple Antenna Systems: Frontier of Wireless Access
[chapter]
2005
Emerging Location Aware Broadband Wireless Ad Hoc Networks
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The paper highlights the two main techniques: smart antennas with adaptive beamforming to cancel the interference signals (from other users or multipath) and MIMO systems to exploit the space-time properties ...
the wireless LAN and the wireless PAN up to the future 4G mobile system focused on seamlessly integration of the existing wireless technologies. ...
a greater performance for the uplink CDMA systems [l]. ...
doi:10.1007/0-387-23072-6_4
fatcat:kgcmt3m4ofcobhu42oanjrx7u4
Downlink beamforming for DS-CDMA mobile radio with multimedia services
1999
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)
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Downlink beamforming is a promising technique €or DS-CDMA systems with multimedia services to eflectively reduce strong interferences induced by high data rate users. ...
In this paper, we first proposed a new downlink beamforming algorithm which converts downlink beamforming problem to a virtual uplink one and takes into account of the data rate information of all users ...
In this paper, we evaluate downlink performance of DS-CDMA systems with base station antenna array. ...
doi:10.1109/vetecf.1999.797032
fatcat:d53nebfpwbfh3gz2jbndsnd4vi
Downlink processing algorithms for multi-antenna wireless communications
2005
IEEE Communications Magazine
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The pre-RAKE transmit diversity system combines the advantages of pre-RAKE diversity, which can provide multipath diversity, and transmit antenna diversity, which can provide space diversity. ...
This article provides a survey of downlink processing algorithms for multi-antenna systems. ...
ACKNOWLEDGMENTS The authors are indebted to the anonymous reviewers for constructive notes and criticisms. Dr. Ali Dakdouki gratefully acknowledges the funding of his research by the U.K. EPSRC. ...
doi:10.1109/mcom.2005.1381885
fatcat:5sw2fxzhxrflbnzmvh4x632cne
Combined Beamforming And Channel Estimation In Wcdma Communication Systems
2007
Zenodo
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Most of the existing schemes rely on time multiplex a training sequence with the user data. ...
(MAI) suppression techniques in the uplink (from mobile to base station). ...
Fig. (1) illustrates the Q channel uplink processing for channel parameter estimation. Fig. (2) shows the uplink space-time RAKE implementation. ...
doi:10.5281/zenodo.1075318
fatcat:b2yc4habyfd5zex6rxtjcj42au
Two suboptimal algorithms for downlink beamforming in FDD DS-CDMA mobile radio
2001
IEEE Journal on Selected Areas in Communications
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We also evaluate the multicell downlink capacity of DS-CDMA systems using per-user-per-weight beamforming scheme. ...
Two suboptimal algorithms are proposed for downlink beamforming in FDD DS-CDMA mobile radio by using uplink beamforming weights. ...
For uplink, signals received at base station antenna array are passed into an adaptive beamformer, followed by a Rake receiver for coherent detection. ...
doi:10.1109/49.932695
fatcat:qnlbsc3cs5behkvtl437r5n5da
Downlink beamforming for DS-CDMA mobile radio with multimedia services
2001
IEEE Transactions on Communications
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Downlink beamforming is a promising technique for direct-sequence code-division multiple-access (DS-CDMA) systems with multimedia services to effectively reduce strong interferences induced by high data ...
Computer simulation results are given to evaluate downlink capacity of DS-CDMA systems using base station antenna array and the new algorithms proposed in this paper. ...
DOWNLINK BEAMFORMING In uplink, both beamformer and RAKE receiver are implemented in base station [4] , [11] , [19] . ...
doi:10.1109/26.935169
fatcat:2lgmiyvstfatjl6b2kwbet5lim
Joint Constrained LMS Algorithm and Base Station Assignment for DS-CDMA Receiver in Multipath Fading Channels
2010
2010 International Conference on Computational Intelligence and Software Engineering
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Keywords-Adaptive beamforming; base station assignment; DS-CDMA; maximal ratio combining; perfect power control. I. ...
In this paper, we propose base station assignment method based on minimizing the transmitter power (BSA-MTP) technique in a direct sequence-code division multiple access (DS-CDMA) receiver in the presence ...
CONCLUSIONS In this paper, we studied the RAKE receiver performance of multiple-cell DS-CDMA system with the space diversity processing, Rayleigh frequency-selective channel model, closed-loop power control ...
doi:10.1109/wicom.2010.5600807
fatcat:ajvhbevbcvenflf7uj53urrhrm
Suppressing Opposite-Direction Interference in TDD/CDMA Systems With Asymmetric Traffic by Antenna Beamforming
2004
IEEE Transactions on Vehicular Technology
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may interfere with the uplink received signals of the home cell. ...
One of the key advantages for the time-division duplex (TDD) system is the capability to deliver asymmetric traffic services by allocating different numbers of uplink and downlink time slots. ...
ACKNOWLEDGMENT The authors are grateful to Dr. T. Wong as well as the anonymous reviewers, who provided useful comments and remarks that helped to improve the quality of this paper. ...
doi:10.1109/tvt.2004.830941
fatcat:2uro7uibkrhdpd67usag2u6ghy
System aspects of smart-antenna technology in cellular wireless communications-an overview
2000
IEEE transactions on microwave theory and techniques
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We surveyed the three main system aspects of smart antenna (SA) technology in wireless communications i.e. SA receiver, wireless network control and planning with SA. ...
We discuss system integration of SA receivers taking into consideration expected propagation conditions, user mobility and offered traffic. ...
Halme at Helsinki University of Technology for continuing support of the research in this area. ...
doi:10.1109/22.846718
fatcat:cyxlgac275h3pfv6b6lx22evlq
Interference Management for DS-CDMA Systems through Closed-Loop Power Control, Base Station Assignment, and Beamforming
2010
Wireless Sensor Network
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division multiple access (DS-CDMA) receiver with frequency-selective Rayleigh fading. ...
Thus, the matched filter (MF) can use for more reduction of the IPI and MAI in each RAKE finger in the second stage. ...
Conclusions In this paper, we studied the RAKE receiver performance of multiple-cell DS-CDMA system with the space diversity processing, Rayleigh frequency-selective channel model, closed-loop power control ...
doi:10.4236/wsn.2010.26059
fatcat:3gluxjf4rjfdlpjwjz4gexz36q
Editorial
2004
EURASIP Journal on Wireless Communications and Networking
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Since multiuser detection relies on the cyclostationarity of the received signal, which is significantly complicated by the time-varying modeling of the long-code system, research on blind multiuser detection ...
In this special issue, novel techniques on spreading sequences design, space diversity (multiple transmit and receive antennas), time diversity (channel coding, interleaving), and combination of CDMA and ...
(iii) Dang and van der Veen present a joint multiuser source-channel estimation approach for long-code CDMA, which is the combination of the blind (decorrelating) RAKE receiver with an iterative symbol ...
doi:10.1155/s1687147204004001
fatcat:gtvfet3dqrb35gfc7tszzvsjku
Joint downlink beamforming, power control, and data rate allocation for DS-CDMA mobile radio with multimedia services
2000
2000 IEEE International Conference on Multimedia and Expo. ICME2000. Proceedings. Latest Advances in the Fast Changing World of Multimedia (Cat. No.00TH8532)
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In this paper, we p m e n t a joint d o d i n k beamforming, power control and mte allocation technique suitable for DS-CDMA systems with multimedia services. ...
Power control and rate allocation are two fundamental issues for improving the spectrum eficiency of downlink transmission for wireless multimedia communications. ...
Jeon, "CDMA/TDD system for wireless multimedia services with traffic unbalance between uplink and downlink )II IEEE JSAC, Oct. 1998 , pp.1437 -1449 . 1999 , pp.17-21. ~01.17, No.5, pp.978-989. 1999 ...
doi:10.1109/icme.2000.871041
dblp:conf/icmcs/LiangCL00
fatcat:qnvf5ejkvfcvpbftsjl7zajkia
DS-CDMA Cellular Systems Performance with Base Station Assignment, Power Control Error and Beamforming over Multipath Fading
2011
International Journal of Computer Networks & Communications
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Also, we present switched-beam (SB) technique in the first stage of the RAKE receiver for enhancing signal to interference plus noise ratio (SINR) in DS- CDMA cellular systems. ...
The interference reduction capability of antenna arrays, base station assignment and the power control algorithms have been considered separately as means to increase the capacity in wireless communication ...
CONCLUSIONS In this paper, we studied the RAKE receiver performance of multiple-cell DS-CDMA system with the space diversity processing, Rayleigh frequency-selective channel model, power control error, ...
doi:10.5121/ijcnc.2011.3112
fatcat:ky3vcin4lbfh5cdkxjyisj6oee
Adaptive multiuser detection and beamforming for interference suppression in CDMA mobile radio systems
1999
IEEE Transactions on Vehicular Technology
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The overall method is suitable for real-time implementation and can substantially improve the interference suppression capabilities of a CDMA system. ...
An adaptive array receiver is presented which integrates multiuser detection, beamforming, and RAKE reception to mitigate cochannel interference and fading. ...
This paper focuses on cochannel interference (CCI) mitigation techniques for the uplink channel of DS-CDMA systems over slowly fading channels. ...
doi:10.1109/25.790508
fatcat:us7ub36dnrek5dpo26o3svuiuy
Multiple antenna systems: Their role and impact in future wireless access
2003
IEEE Communications Magazine
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This article reviews two key related aspects of multiple antenna communication systems: multiple access interference mitigation at the receiver via multi-user beamforming; and space-time modulation and ...
In view of this role, the area of multiple antenna communication systems is in the forefront of wireless research. ...
ACKNOWLEDGMENTS The research reported here is part of a Canadian Institute for Telecommunications Research (CITR) major project entitled "Multi-Rate Wireless Data Access." ...
doi:10.1109/mcom.2003.1215645
fatcat:ehr4diwrqfbijgfyqckodhnusq
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