Resource allocation for maximizing outage throughput in OFDMA systems with finite-rate feedback

Wu, Bo, Bai, Lin, Chen, Chen and Choi, Jinho 2011, Resource allocation for maximizing outage throughput in OFDMA systems with finite-rate feedback, EURASIP journal on wireless communications and networking, vol. 2011, pp. 1-10, doi: 10.1186/1687-1499-2011-56.

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Title Resource allocation for maximizing outage throughput in OFDMA systems with finite-rate feedback
Author(s) Wu, Bo
Bai, Lin
Chen, Chen
Choi, JinhoORCID iD for Choi, Jinho orcid.org/0000-0002-4895-6680
Journal name EURASIP journal on wireless communications and networking
Volume number 2011
Article ID 56
Start page 1
End page 10
Total pages 10
Publisher SpringerOpen
Place of publication London, Eng.
Publication date 2011
ISSN 1687-1472
1687-1499
Keyword(s) orthogonal frequency division multiple access (OFDMA)
limited feedback
quantized channel information
rate-distortion
resource allocation
two-step suboptimal algorithm
science & technology
technology
engineering, electrical & electronic
telecommunications
engineering
Summary Previous works on orthogonal frequency division multiple access (OFDMA) systems with quantized channel state information (CSI) were mainly based on suboptimal quantization methods. In this paper, we consider the performance limit of OFDMA systems with quantized CSI over independent Rayleigh fading channels using the rate-distortion theory. First, we establish a lower bound on the capacity of the feedback channel and build the test channel that achieves this lower bound. Then, with the derived test channel, we characterize the system performance with the outage throughput and formulate the outage throughput maximization problem with quantized channel state information (CSI). To solve this problem in low complexity, we develop a suboptimal algorithm that performs resource allocation in two steps: subcarrier allocation and power allocation. Using this approach, we can numerically evaluate the outage throughput in terms of feedback rate. Numerical results show that this suboptimal algorithm can provide a near optimal performance (with a performance loss of less than 5%) and the outage throughput with a limited feedback rate can be close to that with perfect CSI.
Language eng
DOI 10.1186/1687-1499-2011-56
Field of Research 0906 Electrical And Electronic Engineering
0806 Information Systems
1005 Communications Technologies
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2011, Wu et al.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30115878

Document type: Journal Article
Collections: School of Information Technology
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