A low-complexity joint power control and beamforming algorithm for the downlink of multi-user W-CDMA coordinated systems

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Fältnamn	Indikatorer	Metadata
000		03076naa a2200313 4500
001		oai:research.chalmers.se:fa33ce50-7ec1-4b56-abbc-9eec88e8145e
003		SwePub
008		171007s2009 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
020		a 9781424436965
024	7	a https://doi.org/10.1109/SPAWC.2009.51617802 DOI
024	7	a https://research.chalmers.se/publication/897792 URI
040		a (SwePub)cth
041		a engb eng
042		9 SwePub
072	7	a kon2 swepub-publicationtype
072	7	a ref2 swepub-contenttype
100	1	a Botella Mascarell, Carmen,d 1979u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)carmenb
245	1 0	a A low-complexity joint power control and beamforming algorithm for the downlink of multi-user W-CDMA coordinated systems
264	1	c 2009
520		a The downlink of aW-CDMA system with coordination betweenseveral base stations is considered throughout this paper. Within the framework of the power minimization problem, two Joint Power Control and Optimal Beamforming (JPCOB) algorithms have already been proposed in previous works. However, one of the major challenges associated with network coordination is the design of algorithms which result in low-complexity requirements as the number of users increases. In this paper, one of the previous JPCOBalgorithms is modified in order to obtain a low-complexity solution by reducing the amount of feedback required from the users in the system. The performance of this algorithm is then compared with the previous JPCOB solutions. Simulation results show that the low-complexity algorithm equals the performance of the previous solutions for a given number of coordinated base stations. However,it suffers a severe penalty for scenarios with high SINR requirements at the users. In order to overcome this drawback, two iterative schemes based on the particular structure of the matrices involved in the power control updating step are proposed. Moreover, these schemes could be seen as efficient and computationally simple scheduling techniques.
650	7	a TEKNIK OCH TEKNOLOGIERx Elektroteknik och elektronikx Telekommunikation0 (SwePub)202042 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Electrical Engineering, Electronic Engineering, Information Engineeringx Telecommunications0 (SwePub)202042 hsv//eng
700	1	a Domene, Fernandou Universitat Politecnica de Valencia (UPV),Polytechnic University of Valencia (UPV)4 aut
700	1	a Pinero, Gemau Universitat Politecnica de Valencia (UPV),Polytechnic University of Valencia (UPV)4 aut
700	1	a Svensson, Tommy,d 1970u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)tommys
710	2	a Chalmers tekniska högskolab Universitat Politecnica de Valencia (UPV)4 org
773	0	t Proc. IEEE International Workshop on Signal Processing Advances for Wireless Communications (SPAWC09), June 2009g , s. 226-230q <226-230z 9781424436965
856	4 8	u https://doi.org/10.1109/SPAWC.2009.5161780
856	4 8	u https://research.chalmers.se/publication/89779

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