Orthogonality Factor in WCDMA Downlinks in Urban Macrocelluar Environments
(2005) IEEE Global Communications Conference (GLOBECOM), 2005- Abstract
- Multipath dispersion leads to the loss of orthogonality between signals transmitted simultaneously on a wide-band code division multiple access (WCDMA) downlink. The orthogonality factor (OF), which models its impact in the link signal-to-interference-plus-noise ratio (SINR) equation, depends - to a large extent - on the power delay profile of the multipath channel between the mobile and its serving base station. We use the comprehensive and general COST259 channel model for urban cellular environments to evaluate the impact on the OF of multipath clusters and distance-dependence of the multipath delay decay time constant, both of which have been observed in several channel measurements. The observed large standard deviation of the OF... (More)
- Multipath dispersion leads to the loss of orthogonality between signals transmitted simultaneously on a wide-band code division multiple access (WCDMA) downlink. The orthogonality factor (OF), which models its impact in the link signal-to-interference-plus-noise ratio (SINR) equation, depends - to a large extent - on the power delay profile of the multipath channel between the mobile and its serving base station. We use the comprehensive and general COST259 channel model for urban cellular environments to evaluate the impact on the OF of multipath clusters and distance-dependence of the multipath delay decay time constant, both of which have been observed in several channel measurements. The observed large standard deviation of the OF indicates that using a single value for all users in downlink capacity analyses and simulations, as has been the practice, may lead to erroneous conclusions. We also propose an empirical model to analytically characterize the observed statistics of the OF. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/600832
- author
- Mehta, N ; Molisch, Andreas LU and Greenstein, L
- organization
- publishing date
- 2005
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- broadband networks, cellular radio, channel capacity, code division multiple access, multipath channels, radio links
- host publication
- IEEE Global Telecommunications Conference, GLOBECOM '05.
- pages
- 5 pages
- conference name
- IEEE Global Communications Conference (GLOBECOM), 2005
- conference location
- St. Louis, MO, United States
- conference dates
- 2005-11-11 - 2005-12-02
- external identifiers
-
- scopus:33846592405
- ISBN
- 0-7803-9414-3
- DOI
- 10.1109/GLOCOM.2005.1578400
- language
- English
- LU publication?
- yes
- id
- 870a5603-6c39-4e94-8cbd-31957c8901ad (old id 600832)
- date added to LUP
- 2016-04-04 12:50:11
- date last changed
- 2022-04-24 02:11:45
@inproceedings{870a5603-6c39-4e94-8cbd-31957c8901ad, abstract = {{Multipath dispersion leads to the loss of orthogonality between signals transmitted simultaneously on a wide-band code division multiple access (WCDMA) downlink. The orthogonality factor (OF), which models its impact in the link signal-to-interference-plus-noise ratio (SINR) equation, depends - to a large extent - on the power delay profile of the multipath channel between the mobile and its serving base station. We use the comprehensive and general COST259 channel model for urban cellular environments to evaluate the impact on the OF of multipath clusters and distance-dependence of the multipath delay decay time constant, both of which have been observed in several channel measurements. The observed large standard deviation of the OF indicates that using a single value for all users in downlink capacity analyses and simulations, as has been the practice, may lead to erroneous conclusions. We also propose an empirical model to analytically characterize the observed statistics of the OF.}}, author = {{Mehta, N and Molisch, Andreas and Greenstein, L}}, booktitle = {{IEEE Global Telecommunications Conference, GLOBECOM '05.}}, isbn = {{0-7803-9414-3}}, keywords = {{broadband networks; cellular radio; channel capacity; code division multiple access; multipath channels; radio links}}, language = {{eng}}, title = {{Orthogonality Factor in WCDMA Downlinks in Urban Macrocelluar Environments}}, url = {{http://dx.doi.org/10.1109/GLOCOM.2005.1578400}}, doi = {{10.1109/GLOCOM.2005.1578400}}, year = {{2005}}, }