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Dependence of the mean SNR on the interaction between multiuser diversity, multipath diversity, and feedback delay

Florén, Fredrik LU ; Win, M; Edfors, Ove LU and Molin, Bengt-Arne LU (2005) IEEE Vehicular Technology Conference -VTC Spring, 2005 In 2005 IEEE 61st Vehicular Technology Conference. VTC2005- Spring p.1898-1902
Abstract
We examine wireless systems employing Rake receivers and fast scheduling over multiple users. The interactions between multipath diversity, multiuser diversity, and the feedback delay are investigated in terms of the mean signal-to-noise ratio (SNR). It is assumed that all users experience the same propagation characteristics, i.e., the same number of taps and power-delay profile (PDP). The results are exact as well as asymptotic (in the number of users) expressions that quantify this interaction. It is found that as the number of taps in the channel increases, the multiuser diversity gain decreases but better robustness against feedback delay is achieved. Furthermore, the asymptotic results derived show good agreement with the exact... (More)
We examine wireless systems employing Rake receivers and fast scheduling over multiple users. The interactions between multipath diversity, multiuser diversity, and the feedback delay are investigated in terms of the mean signal-to-noise ratio (SNR). It is assumed that all users experience the same propagation characteristics, i.e., the same number of taps and power-delay profile (PDP). The results are exact as well as asymptotic (in the number of users) expressions that quantify this interaction. It is found that as the number of taps in the channel increases, the multiuser diversity gain decreases but better robustness against feedback delay is achieved. Furthermore, the asymptotic results derived show good agreement with the exact results for an exponential PDP, even for few users. Thus, we obtain expressions for the mean SNR that are compact and easy to evaluate (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
power-delay profile, signal-to-noise ratio, Rake receivers, wireless systems, feedback delay, multiuser diversity, multipath diversity
in
2005 IEEE 61st Vehicular Technology Conference. VTC2005- Spring
pages
1898 - 1902
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE Vehicular Technology Conference -VTC Spring, 2005
external identifiers
  • WOS:000232179302101
  • Scopus:26444515526
ISBN
0-7803-8887-9
DOI
10.1109/VETECS.2005.1543652
language
English
LU publication?
yes
id
0e273511-343b-4fd4-a804-69a10313554f (old id 615534)
date added to LUP
2007-11-25 10:17:52
date last changed
2016-10-13 04:46:45
@misc{0e273511-343b-4fd4-a804-69a10313554f,
  abstract     = {We examine wireless systems employing Rake receivers and fast scheduling over multiple users. The interactions between multipath diversity, multiuser diversity, and the feedback delay are investigated in terms of the mean signal-to-noise ratio (SNR). It is assumed that all users experience the same propagation characteristics, i.e., the same number of taps and power-delay profile (PDP). The results are exact as well as asymptotic (in the number of users) expressions that quantify this interaction. It is found that as the number of taps in the channel increases, the multiuser diversity gain decreases but better robustness against feedback delay is achieved. Furthermore, the asymptotic results derived show good agreement with the exact results for an exponential PDP, even for few users. Thus, we obtain expressions for the mean SNR that are compact and easy to evaluate},
  author       = {Florén, Fredrik and Win, M and Edfors, Ove and Molin, Bengt-Arne},
  isbn         = {0-7803-8887-9},
  keyword      = {power-delay profile,signal-to-noise ratio,Rake receivers,wireless systems,feedback delay,multiuser diversity,multipath diversity},
  language     = {eng},
  pages        = {1898--1902},
  publisher    = {ARRAY(0x8d81f08)},
  series       = {2005 IEEE 61st Vehicular Technology Conference. VTC2005- Spring},
  title        = {Dependence of the mean SNR on the interaction between multiuser diversity, multipath diversity, and feedback delay},
  url          = {http://dx.doi.org/10.1109/VETECS.2005.1543652},
  year         = {2005},
}