Relay Selection and Power Allocation in Amplify-and-Forward Cognitive Radio Networks: A Special Spectrum Sharing Scheme

doi:10.1007/s12204-015-1642-7

上海交通大学学报（英文版） ›› 2015, Vol. 20 ›› Issue (4): 403-407.doi: 10.1007/s12204-015-1642-7

Relay Selection and Power Allocation in Amplify-and-Forward Cognitive Radio Networks: A Special Spectrum Sharing Scheme

ZHAO Da-qian* (赵大骞), PEI Er-rong (裴二荣), ZHANG Zhi-zhong (张治中)

(School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)

出版日期:2015-08-29 发布日期:2015-08-05
通讯作者: ZHAO Da-qian (赵大骞) E-mail:daqianneo@foxmail.com

Relay Selection and Power Allocation in Amplify-and-Forward Cognitive Radio Networks: A Special Spectrum Sharing Scheme

ZHAO Da-qian* (赵大骞), PEI Er-rong (裴二荣), ZHANG Zhi-zhong (张治中)

(School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)

Online:2015-08-29 Published:2015-08-05
Contact: ZHAO Da-qian (赵大骞) E-mail:daqianneo@foxmail.com

摘要/Abstract

摘要： 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.

关键词: relay selection, power allocation, amplify-and-forward, spectrum sharing, cognitive radio network

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.

Key words: relay selection, power allocation, amplify-and-forward, spectrum sharing, cognitive radio network

中图分类号:

TN 925.93

ZHAO Da-qian* (赵大骞), PEI Er-rong (裴二荣), ZHANG Zhi-zhong (张治中). Relay Selection and Power Allocation in Amplify-and-Forward Cognitive Radio Networks: A Special Spectrum Sharing Scheme[J]. 上海交通大学学报（英文版）, 2015, 20(4): 403-407.

ZHAO Da-qian* (赵大骞), PEI Er-rong (裴二荣), ZHANG Zhi-zhong (张治中). Relay Selection and Power Allocation in Amplify-and-Forward Cognitive Radio Networks: A Special Spectrum Sharing Scheme[J]. Journal of shanghai Jiaotong University (Science), 2015, 20(4): 403-407.

参考文献 12

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Relay Selection and Power Allocation in Amplify-and-Forward Cognitive Radio Networks: A Special Spectrum Sharing Scheme

Relay Selection and Power Allocation in Amplify-and-Forward Cognitive Radio Networks: A Special Spectrum Sharing Scheme

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