Adaptive Subcarrier Assignment and Power Distribution in Multiuser OFDM Systems with Proportional Data Rate Requirement
A low complexity dynamic subcarrier and power allocation methodology for downlink communication in an OFDM-based multiuser environment is developed. The problem of maximizing overall capacity with constraints on total power consumption, bit error rate and data rate proportionality among users requir...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Iran University of Science and Technology
2008-01-01
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| Series: | Iranian Journal of Electrical and Electronic Engineering |
| Subjects: | |
| Online Access: | http://ijeee.iust.ac.ir/browse.php?a_code=A-10-3-31&slc_lang=en&sid=1 |
| _version_ | 1818359135213715456 |
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| author | A. Falahati M.-R. Ardestani |
| author_facet | A. Falahati M.-R. Ardestani |
| author_sort | A. Falahati |
| collection | DOAJ |
| description | A low complexity dynamic subcarrier and power allocation methodology for
downlink communication in an OFDM-based multiuser environment is developed. The
problem of maximizing overall capacity with constraints on total power consumption, bit
error rate and data rate proportionality among users requiring different QOS specifications
is formulated. Assuming perfect knowledge of the instantaneous channel gains for all users,
a new simple algorithm is developed to solve the mentioned problem. We compare the sum
capacity, proportionality, and computational complexity of the proposed algorithm with the
one presented by Wong et al. Numerical results demonstrate that the proposed algorithm
offers a performance comparable with Wong’s algorithm, yet complexity remains low and
proportionality constraint will be tightly satisfied. As well, the proposed algorithm can
provide a flexible trade-off between complexity, capacity and proportionality constraint. |
| first_indexed | 2024-12-13T20:40:05Z |
| format | Article |
| id | doaj.art-55a21ad362b24afe94a01aec9c26e78a |
| institution | Directory Open Access Journal |
| issn | 1735-2827 2383-3890 |
| language | English |
| last_indexed | 2024-12-13T20:40:05Z |
| publishDate | 2008-01-01 |
| publisher | Iran University of Science and Technology |
| record_format | Article |
| series | Iranian Journal of Electrical and Electronic Engineering |
| spelling | doaj.art-55a21ad362b24afe94a01aec9c26e78a2022-12-21T23:32:10ZengIran University of Science and TechnologyIranian Journal of Electrical and Electronic Engineering1735-28272383-38902008-01-01411016Adaptive Subcarrier Assignment and Power Distribution in Multiuser OFDM Systems with Proportional Data Rate RequirementA. Falahati0M.-R. Ardestani1 A low complexity dynamic subcarrier and power allocation methodology for downlink communication in an OFDM-based multiuser environment is developed. The problem of maximizing overall capacity with constraints on total power consumption, bit error rate and data rate proportionality among users requiring different QOS specifications is formulated. Assuming perfect knowledge of the instantaneous channel gains for all users, a new simple algorithm is developed to solve the mentioned problem. We compare the sum capacity, proportionality, and computational complexity of the proposed algorithm with the one presented by Wong et al. Numerical results demonstrate that the proposed algorithm offers a performance comparable with Wong’s algorithm, yet complexity remains low and proportionality constraint will be tightly satisfied. As well, the proposed algorithm can provide a flexible trade-off between complexity, capacity and proportionality constraint.http://ijeee.iust.ac.ir/browse.php?a_code=A-10-3-31&slc_lang=en&sid=1Adaptive Multiuser OFDM Multiuser Diversity Proportionality Resource Allocation. |
| spellingShingle | A. Falahati M.-R. Ardestani Adaptive Subcarrier Assignment and Power Distribution in Multiuser OFDM Systems with Proportional Data Rate Requirement Iranian Journal of Electrical and Electronic Engineering Adaptive Multiuser OFDM Multiuser Diversity Proportionality Resource Allocation. |
| title | Adaptive Subcarrier Assignment and Power Distribution in Multiuser OFDM Systems with Proportional Data Rate Requirement |
| title_full | Adaptive Subcarrier Assignment and Power Distribution in Multiuser OFDM Systems with Proportional Data Rate Requirement |
| title_fullStr | Adaptive Subcarrier Assignment and Power Distribution in Multiuser OFDM Systems with Proportional Data Rate Requirement |
| title_full_unstemmed | Adaptive Subcarrier Assignment and Power Distribution in Multiuser OFDM Systems with Proportional Data Rate Requirement |
| title_short | Adaptive Subcarrier Assignment and Power Distribution in Multiuser OFDM Systems with Proportional Data Rate Requirement |
| title_sort | adaptive subcarrier assignment and power distribution in multiuser ofdm systems with proportional data rate requirement |
| topic | Adaptive Multiuser OFDM Multiuser Diversity Proportionality Resource Allocation. |
| url | http://ijeee.iust.ac.ir/browse.php?a_code=A-10-3-31&slc_lang=en&sid=1 |
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