Power Allocation and Bit Loading for Spatial Multiplexing in MIMO Systems

Reference : Power Allocation and Bit Loading for Spatial Multiplexing in MIMO Systems


	Document type :	Scientific congresses, symposiums and conference proceedings : Paper published in a journal
	Discipline(s) :	Engineering, computing & technology : Computer science Engineering, computing & technology : Electrical & electronics engineering
	To cite this reference:	http://hdl.handle.net/10993/43424

Title :	Power Allocation and Bit Loading for Spatial Multiplexing in MIMO Systems
Language :	English
Author, co-author :	Zhang, Xi [> >]
	Ottersten, Björn [KTH Royal Institute of Technoloy]
Publication date :	2003
Journal title :	Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing
Peer reviewed :	Yes
Event name :	Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing
Event date :	April 2003
Abstract :	[en] The power assignment problem is important for Multiple-Input-Multiple-Output (MIMO) systems to achieve high capacity. Although this problem is solved by well-known water filling algorithms, this does not provide an optimal solution if the system is constrained to a fixed raw bit error rate threshold and to discrete modulation s. In this work an approximate approach, called QoS based WF, is proposed to solve the power assignment problem with such constrains. It is shown to outperform quantization of the conventional water filling solution and a well known bit loading algorithm (Chow's algorithm) used in the Digital Subscriber Lines (DSL).
Permalink :	http://hdl.handle.net/10993/43424

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