Abstract
This paper investigates OFDMA downlink resource
(spectrum and power) sharing algorithms for fixed relay stations.
Iterative waterfilling is used in the power allocation process
and shown to result in an optimal power allocation solution for
multiple-relay networks. Iterative waterfilling is then developed
with a power reallocation process to achieve more efficient
spectrum utilization. Furthermore, joint subcarrier and power
allocation algorithms are proposed with and without consideration
for multiuser fairness. Simulation results show that iterative
waterfilling can significantly improve the system capacity. The
proposed joint allocation algorithm achieves gains of up to 21%
in system capacity compared to iterative waterfilling. The joint
allocation algorithm with fairness is shown to degrade system
capacity, however fairness is important in a multiuser network.
| Translated title of the contribution | Efficient power and subcarrier allocation for OFDMA-based relay networks |
|---|---|
| Original language | English |
| Title of host publication | 20th Personal, Indoor and Mobile Radio Communications Symposium 2009 (PIMRC2009), Tokyo, Japan |
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Pages | 1 - 5 |
| Number of pages | 5 |
| Publication status | Published - 13 Sept 2009 |