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Maximum Transmission Capacity in Cognitive Radio Networks

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Abstract

The transmission capacities (TC) is defined as the sum of successful transmissions per unit area in the secondary and the primary systems while meeting the target outage probabilities of both. We obtain the TC of different spectrum sharing modes in cognitive radio networks over fading channels by stochastic geometry. The ratios of transmission power and user density between two systems are derived. The constraint is found to make the TC of spectrum sharing mode exceed that of single system mode. The upper bound of TC is derived and an accessing strategy to reach the maximum value is proposed, under which the TC of secondary user will be maximized when that of primary user is fixed. Numerical results confirm the analytical derivations and show that the TC with our accessing strategy will be larger than that of single primary system mode or fixed spectrum sharing mode.

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Acknowledgements

The authors would like to thank the reviewers for their detailed reviews and constructive comments, which have helped improve the quality of this paper. This work was supported in part by the important national science and technology specific projects under Grant No. 2011ZX03005-004-03, National Natural Science Foundation of China under Grant No. 61171081, National Natural Science Foundation of China under Grant No. 61362038, Natural Science Foundation of Guangxi under Grant No. 2011GXNSFB018075, and important project of Wuzhou university under Grant No. 2013B002.

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Authors and Affiliations

  1. National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, Jiangsu, People’s Republic of China

    Shujing Xie & Lianfeng Shen

  2. School of Information and Electronic Engineering, Wuzhou University, Wuzhou, 543002, Guangxi, People’s Republic of China

    Shujing Xie

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  1. Shujing Xie
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  2. Lianfeng Shen
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Correspondence to Shujing Xie.

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Xie, S., Shen, L. Maximum Transmission Capacity in Cognitive Radio Networks. Wireless Pers Commun 96, 3193–3206 (2017). https://doi.org/10.1007/s11277-017-4348-3

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