Abstract
This paper considers sub-channel and power allocation based on genetic algorithms to maximize the overall system capacity using proportional rate constraints in multiuser orthogonal frequency division multiplexing (OFDM) systems. The proposed algorithm first performs sub-channel allocation using a rough rate constraint under the premise of equal power allocation among the sub-channels. Then power allocation proceeds based on the sub-channel allocation scheme to implement proportional fairness and maintain maximum system capacity. Owing to the separation of sub-channel and power allocation, the computational complexity can be reduced from exponential to linear. Additionally, both the sub-channel allocation and power allocation are based on genetic algorithms, so the computational complexity of the proposed resource allocation algorithm can be further reduced. Simulation results show that the proposed algorithm achieves about 95% of the maximum capacity in an eight-user system and that the ratio of data rates among users can be set freely.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Sampath, H., Talwar, S., Tellado, J., Erceg, V., Paulraj, A.: A fourth-generation MIMO-OFDM broadband wireless system: Design, performance, and field trial results. IEEE Commun. Mag. 40(9), 143–149 (2002)
Rappaport, T.S., Annamalai, A., Buehrer, R.M., Tranter, W.H.: Wireless communications: Past events and a future perspective. IEEE Commun. Mag. 40(5), 148–161 (2002)
Huang, W., Letaief, K.B.: A cross-layer resource allocation and scheduling for multiuser space-time block coded MIMO/OFDM Systems. IEEE ICC 4, 2655–2659 (2005)
Liu, G., Liu, X., Zhang, P.: QoS oriented dynamical resource allocation for eigen beamforming MIMO OFDM. IEEE VTC 3, 1450–1454 (2005)
Choi, J.M., Kwak, J.S., Lee, J.H.: Adaptive subcarrier, bit and power allocation algorithm for MIMO-OFDMA system. IEEE VTC, 1801–1805 (2004)
Jang, J., Lee, K.B.: Transmit power adaptation for multiuser OFDM systems. IEEE J. Sel. Areas Commun. 21(2), 171–178 (2003)
Rhee, W., Cioffi, J.M.: Increasing in capacity of multiuser OFDM system using dynamic subchannel allocation. IEEE VTC 2, 1085–1089 (2000)
Sheng, Z., Andrews, J.G., Evans, B.L.: Adaptive resource allocation in multiuser OFDM systems with proportional rate constraints. IEEE Tran. Wireless Commun. 4, 2726–2737 (2005)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2013 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Li, W., Zu, Y., Jia, Y. (2013). Sub-channel and Power Allocation for Multiuser OFDM Systems with Proportional Rate Constraints Based on Genetic Algorithms. In: Su, J., Zhao, B., Sun, Z., Wang, X., Wang, F., Xu, K. (eds) Frontiers in Internet Technologies. Communications in Computer and Information Science, vol 401. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-53959-6_4
Download citation
DOI: https://doi.org/10.1007/978-3-642-53959-6_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-53958-9
Online ISBN: 978-3-642-53959-6
eBook Packages: Computer ScienceComputer Science (R0)