NDLI: On the QoS feasibility region in the vector broadcast channel

Content Provider	IEEE Xplore Digital Library
Author	Hunger, R. Joham, M.
Copyright Year	2010
Description	Author affiliation: Associate Institute for Signal Processing, Technische Universität München, 80290 Munich, Germany (Hunger, R.; Joham, M.)
Abstract	We investigate the geometry of the feasible Quality of Service (QoS) region in the vector broadcast channel when the available transmit power is unbounded. It turns out that a complete description of the feasible QoS region attains its simplest form in the minimum mean square error (MMSE) domain although most of the literature handles feasibility in the SINR domain. As our main contribution, we show that the closure of the feasible MMSE region is a polytope corresponding to a hyper-cube that maybe is cropped by an additional half-space constraint. Interestingly, this half-space constraint is the only relevant one which separates feasibility from infeasibility and it reflects a lower bound on the sum MMSE. Under the assumption of regular channels, this lower bound does not depend on the channel realization but solely depends on the number of users and antennas deployed at the base station. Testing feasibility of given QoS targets is easily performed by first converting the QoS targets into upper bounds on the MMSEs and afterwards verifying that the sum of target MMSEs is larger than the difference between antennas at the base station and the number of users. The derived results can be used to decide whether a new user with given QoS requirements can be admitted to the system, and if not, how the requirements have to be adapted such that they become feasible.
Starting Page	3478
Ending Page	3481
File Size	136092
Page Count	4
File Format	PDF
ISBN	9781424442959
ISSN	15206149
DOI	10.1109/ICASSP.2010.5495959
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-03-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Broadcasting Signal to noise ratio Quality of service Base stations Geometry Covariance matrix Signal processing Telephony Mean square error methods Testing feasibility check QoS region
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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