Power Allocation for Energy-Harvesting-based Fading Cognitive Multiple Access Channels : with or without Successive Interference Cancellation

• Autorzy: Li Q. , Xu D.

Identyfikatory

DOI

10.1515/eletel-2017-0009

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

cognitive radio; power allocation; multiple access channels; energy harvesting

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: International Journal of Electronics and Telecommunications
• Rocznik: 2017
• Tom: Vol. 63, No. 1
• Strony: 65--72
• Opis fizyczny: Bibliogr. 17 poz., wykr.

Twórcy

autor

Li Q.

• Wireless Communication Key Lab of Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

autor

Xu D.

• Wireless Communication Key Lab of Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Bibliografia

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• [13] 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.
• [14] 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.
• [15] 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.
• [16] 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.
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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).