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Relay selection and power allocation in amplify-and-forward cognitive radio networks: A special spectrum sharing scheme

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Abstract

In this paper, we present a special spectrum sharing scheme that is a joint optimization of relay selection and power allocation at the secondary transmitter, where the primary user is incapable of supporting its target signal-to-noise ratio (SNR). Specifically, the selected secondary transmitter assists the primary user with achieving its target SNR via two-phase cooperative amplify-and-forward relaying. By searching for the candidate secondary transmitters which have already satisfied the primary user’s target SNR, we can select the optimal secondary transmitter. This optimal secondary transmitter not only satisfies the primary user’s target SNR, but also maximizes the throughput of the secondary user. We study this joint optimization problem such that the secondary user’s throughput is maximized under the constraint that satisfies the primary user’s target SNR. Numerical results show that our scheme can maximize the throughput of the secondary user, and can obtain the win-win solution for the primary and secondary systems.

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Authors and Affiliations

  1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China

    Da-qian Zhao  (赵大骞), Er-rong Pei  (裴二荣) & Zhi-zhong Zhang  (张治中)

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  1. Da-qian Zhao  (赵大骞)
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  2. Er-rong Pei  (裴二荣)
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  3. Zhi-zhong Zhang  (张治中)
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Corresponding author

Correspondence to Da-qian Zhao  (赵大骞).

Additional information

Foundation item: the National High Technology Research and Development Program (863) of China (No. 2014AA01A706), the National Major Science and Technology Special Project of China (Nos. 2012ZX03001021 and 2012ZX03005008), the National Natural Science Foundation of China (No. 61379159), the Chongqing City College Innovation Team (2013), the Chongqing Municipal Education Commission Science and Technology Research Project (No. KJ130513), and the Chongqing Basic and Cutting-Edge Project (No. cstc2013jcyjA40020)

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Zhao, Dq., Pei, Er. & Zhang, Zz. Relay selection and power allocation in amplify-and-forward cognitive radio networks: A special spectrum sharing scheme. J. Shanghai Jiaotong Univ. (Sci.) 20, 403–407 (2015). https://doi.org/10.1007/s12204-015-1642-7

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  • DOI: https://doi.org/10.1007/s12204-015-1642-7

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