Power Allocation for Energy-Harvesting-based Fading Cognitive Multiple Access Channels: with or without Successive Interference Cancellation
Abstract
This paper considers a fading cognitive multiple access channel (CMAC), where multiple secondary users (SUs), who share the spectrum with a primary user (PU), transmit to a cognitive base station (CBS). A power station is assumed to harvest energy from the nature and then provide power to the SUs. We investigate the power allocation problems for such a CMAC to maximize the SU sum rate under the interference power constraint, the sum transmit power constraint and the peak transmit power constraint of each individual SU. In particular, two scenarios are considered: with successive interference cancellation (SIC) and without SIC. For the first scenario, the optimal power allocation algorithm is derived. For the second scenario, a heuristic algorithm is proposed. We show that the proposed algorithm with SIC outperforms the algorithm without SIC in terms of the SU sum rate, while the algorithm without SIC outperforms the algorithm with SIC in terms of the number of admitted SUs for a high sum transmit power limit and a low peak transmit power limit of each individual SU.References
J. Xue, Z. Feng, and K. Chen, “Beijing spectrum survey for cognitive radio applications,” in IEEE Vehicular Technology Conference Fall, 2013, pp. 1–5.
S. Haykin, “Cognitive radio: brain-empowered wireless communications,” IEEE Journal on Selected Areas in Communications, vol. 23, no. 2, pp. 201–220, 2005.
X. Kang, Y.-C. Liang, A. Nallanathan, K. Garg, and R. Zhang, “Optimal power allocation for fading channels in cognitive radio networks: Ergodic capacity and outage capacity,” IEEE Transactions on Wireless Communications, vol. 8, no. 2, pp. 940–950, 2009.
L. Qun and X. Ding, “Power allocation for ergodic capacity and outage probability tradeoff in cognitive radio networks,” IEICE Transactions on Communications, vol. 98, no. 10, pp. 1988–1995, 2015.
R. Zhang, S. Cui, and Y.-C. Liang, “On ergodic sum capacity of fading cognitive multiple-access and broadcast channels,” IEEE Transactions on Information Theory, vol. 55, no. 11, pp. 5161–5178, 2009.
X. Kang, Y.-C. Liang, and H. K. Garg, “Fading cognitive multiple access channels: Outage capacity regions and optimal power allocation,” IEEE Transactions on Wireless Communications, vol. 9, no. 7, pp. 2382–2391,
W. Wang, W. Wang, Q. Lu, K. G. Shin, and T. Peng, “Geometry-based optimal power control of fading multiple access channels for maximum sum-rate in cognitive radio networks,” IEEE Transactions on Wireless Communications, vol. 9, no. 6, pp. 1843–1848, 2010.
D. Li and Y.-C. Liang, “Power allocation for interference-limited cognitive multiple access channels,” IEEE Wireless Communications Letters, vol. 2, no. 3, pp. 291–294, 2013.
L. Zhang, Y. Xin, Y.-C. Liang, and H. V. Poor, “Cognitive multiple access channels: optimal power allocation for weighted sum rate maximization,” IEEE Transactions on Communications, vol. 57, no. 9, pp. 2754–2762, 2009.
X. Kang, “Optimal power allocation for fading cognitive multiple access channels: a two-user case,” IEEE Wireless Communications Letters, vol. 2, no. 6, pp. 683–686, 2013.
D. Xu and Q. Li, “On the effective capacity region for cognitive radio multiple access channels,” AEU-International Journal of Electronics and
Communications, vol. 69, no. 6, pp. 958–961, 2015.
X. Kang, H. F. Chong, Y.-K. Chia, and S. Sun, “Ergodic sum-rate maximization for fading cognitive multiple-access channels without
successive interference cancelation,” IEEE Transactions on Vehicular Technology, vol. 64, no. 9, pp. 4009–4018, 2015.
D. Xu and Q. Li, “Power allocation for two-user cognitive multiple access channels under primary user outage constraint,” International
Journal of Communication Systems, to be published.
W. Chung, S. Park, S. Lim, and D. Hong, “Optimal transmit power control for energy-harvesting cognitive radio system,” in IEEE Vehicular Technology Conference Fall, 2013, pp. 1–5.
V. Rakovic, D. Denkovski, Z. Hadzi-Velkov, and L. Gavrilovska, “Optimal time sharing in underlay cognitive radio systems with RF energy harvesting,” in IEEE International Conference on Communications, 2015, pp. 7689–7694.
D. T. Hoang, D. Niyato, P. Wang, and D. I. Kim, “Opportunistic channel access and rf energy harvesting in cognitive radio networks,” IEEE
Journal on Selected Areas in Communications, vol. 32, no. 11, pp. 2039–2052, 2014.
S. Boyd and L. Vandenberghe, Convex Optimization. Cambridge, U.K.: Cambridge Univ. Press, 2004.
Downloads
Published
Issue
Section
License
Copyright (c) 2017 International Journal of Electronics and Telecommunications
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
1. License
The non-commercial use of the article will be governed by the Creative Commons Attribution license as currently displayed on https://creativecommons.org/licenses/by/4.0/.
2. Author’s Warranties
The author warrants that the article is original, written by stated author/s, has not been published before, contains no unlawful statements, does not infringe the rights of others, is subject to copyright that is vested exclusively in the author and free of any third party rights, and that any necessary written permissions to quote from other sources have been obtained by the author/s. The undersigned also warrants that the manuscript (or its essential substance) has not been published other than as an abstract or doctorate thesis and has not been submitted for consideration elsewhere, for print, electronic or digital publication.
3. User Rights
Under the Creative Commons Attribution license, the author(s) and users are free to share (copy, distribute and transmit the contribution) under the following conditions: 1. they must attribute the contribution in the manner specified by the author or licensor, 2. they may alter, transform, or build upon this work, 3. they may use this contribution for commercial purposes.
4. Rights of Authors
Authors retain the following rights:
- copyright, and other proprietary rights relating to the article, such as patent rights,
- the right to use the substance of the article in own future works, including lectures and books,
- the right to reproduce the article for own purposes, provided the copies are not offered for sale,
- the right to self-archive the article
- the right to supervision over the integrity of the content of the work and its fair use.
5. Co-Authorship
If the article was prepared jointly with other authors, the signatory of this form warrants that he/she has been authorized by all co-authors to sign this agreement on their behalf, and agrees to inform his/her co-authors of the terms of this agreement.
6. Termination
This agreement can be terminated by the author or the Journal Owner upon two months’ notice where the other party has materially breached this agreement and failed to remedy such breach within a month of being given the terminating party’s notice requesting such breach to be remedied. No breach or violation of this agreement will cause this agreement or any license granted in it to terminate automatically or affect the definition of the Journal Owner. The author and the Journal Owner may agree to terminate this agreement at any time. This agreement or any license granted in it cannot be terminated otherwise than in accordance with this section 6. This License shall remain in effect throughout the term of copyright in the Work and may not be revoked without the express written consent of both parties.
7. Royalties
This agreement entitles the author to no royalties or other fees. To such extent as legally permissible, the author waives his or her right to collect royalties relative to the article in respect of any use of the article by the Journal Owner or its sublicensee.
8. Miscellaneous
The Journal Owner will publish the article (or have it published) in the Journal if the article’s editorial process is successfully completed and the Journal Owner or its sublicensee has become obligated to have the article published. Where such obligation depends on the payment of a fee, it shall not be deemed to exist until such time as that fee is paid. The Journal Owner may conform the article to a style of punctuation, spelling, capitalization and usage that it deems appropriate. The Journal Owner will be allowed to sublicense the rights that are licensed to it under this agreement. This agreement will be governed by the laws of Poland.
By signing this License, Author(s) warrant(s) that they have the full power to enter into this agreement. This License shall remain in effect throughout the term of copyright in the Work and may not be revoked without the express written consent of both parties.
