Technology of Network & Communication
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App. Res. of Comp. Printed Article
Vol. 36, 2019 No. 4
1165-1168,1173

CRN downlink power allocation and beamforming algorithm based on duality of uplink-downlink

Ji Zhongheng
Ji Xinsheng
Huang Kaizhi
National Digital Switching Systems Engineering & Technological Research Center, Zhengzhou 450002, China
DOI: 10.19734/j.issn.1001-3695.2017.10.1011

Abstract

There are some problems on multi-user downlink power allocation and beamforming in a cognitive radio network(CRN) which works in the underlay mode. They are the high complexity of the conventional SDR algorithm, the limited applicability and ignoring the interferences of the primary network(PN) to the secondary user(SU), etc. Aiming at these problems, this paper firstly added the term of interference of the PN to the SU to the CRN model and formulated the optimization problem. Then based on the duality of uplink-downlink, it obtained the simple and fast iterative algorithm by introducing virtual power, transforming the optimization problem into the problem of uplink power allocation and beamforming. And it analyzed the convergence of the algorithm to obtain the convergent conditions. It also reckoned the algorithm complexity. The result demonstrates that iterative algorithm is superior to the SDR algorithm. Numerical simulation results show that the algorithm converges faster, and that the variation of transmitting power of the primary base station(PBS) could affect the feasibility region. They also show that the increasing of transmitting power of the PBS could lead to the downlink power increasing. The influences are notable.

Foundation Support

国家“863”计划资助项目(SS2015AA011306)
国家自然科学基金资助项目(61379006,61521003)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2017.10.1011
Publish at: Application Research of Computers Printed Article, Vol. 36, 2019 No. 4
Section: Technology of Network & Communication
Pages: 1165-1168,1173
Serial Number: 1001-3695(2019)04-045-1165-04

Publish History

[2019-04-05] Printed Article

Cite This Article

季中恒, 季新生, 黄开枝. 基于上下行对偶的CRN下行功率分配和波束赋形算法 [J]. 计算机应用研究, 2019, 36 (4): 1165-1168,1173. (Ji Zhongheng, Ji Xinsheng, Huang Kaizhi. CRN downlink power allocation and beamforming algorithm based on duality of uplink-downlink [J]. Application Research of Computers, 2019, 36 (4): 1165-1168,1173. )

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  • Application Research of Computers Monthly Journal
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Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

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