Referenced Items are not available for this document.
In this letter, we study an application of hierarchical constellations (known also as embedded, multi-resolution, or asymmetrical constellations) for multi-user opportunistic scheduling. The key idea is to rely on hierarchical constellations to transmit information to two or more best users simultaneously in each transmission. The transmit power as well as the constellation parameter is changed according to the link qualities of the selected users in a way that a given target bit error rate (BER) is satisfied. The expressions for the average transmit power, and the outage probability with truncated channel inversion power control are presented. We also analyze and compare buffer distribution, average buffer occupancy, and packet loss probability of different; schemes via queuing analysis. We finally compare the hierarchical scheme for multi-user scheduling with a uniform constellation-based time-slotted scheme
Published in:
Wireless Communications, IEEE Transactions on
(Volume:6
,
Issue:
5
)
Date of Publication: May 2007
- Page(s):
- 1581 - 1586
- ISSN :
- 1536-1276
- INSPEC Accession Number:
- 9458043
- Digital Object Identifier :
- 10.1109/TWC.2007.360353
- Date of Current Version :
- 21 May 2007
- Issue Date :
- May 2007
- Sponsored by :
- IEEE Communications Society
About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies
A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2013 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.
