Power distribution method with maximum energy efficiency based on frequency spectrum sharing

An allocation method and spectrum sharing technology, which is applied in the field of power allocation to maximize the energy efficiency of secondary users, and can solve problems such as the inability to guarantee the maximum energy efficiency of secondary users and energy waste.

Active Publication Date: 2015-11-25
XIDIAN UNIV
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Problems solved by technology

This power allocation method, because it does not take into account the impact of the energy efficiency obtained by the secondary user on power allocation, cannot guarantee the maximum energy efficiency of the secondary user, resulting in a large amount of additional energy consumption and greenhouse gas emissions, resulting in unnecessary energy waste

Method used

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  • Power distribution method with maximum energy efficiency based on frequency spectrum sharing
  • Power distribution method with maximum energy efficiency based on frequency spectrum sharing
  • Power distribution method with maximum energy efficiency based on frequency spectrum sharing

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Embodiment Construction

[0038] refer to figure 1 , the implementation steps of the present invention are as follows:

[0039] Step 1: Cognitive users set target parameters.

[0040] According to the required error tolerance, Lagrangian iteration effect and the maximum number of iterations required, the secondary user sets the energy efficiency function error tolerance ξ>0, the maximum number of iterations N, and the convergence error ξ of the subgradient iterative algorithm corresponding to the average transmission power constraint 1 >0, the corresponding Lagrangian multiplier iteration step size t 1 >0, the convergence error ξ of the subgradient iterative algorithm corresponding to the average interference power constraint 2 >0, the corresponding Lagrangian multiplier iteration step size t 2 >0;

[0041] The smaller the error tolerance of the energy efficiency function, the more iterations may be needed, and the number of iterations also depends on the average interference constraint, the averag...

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Abstract

The invention discloses a power distribution method with maximum energy efficiency based on frequency spectrum sharing. The method solves the problem that existing cognitive radio power distribution method could obtain the maximization of the energy efficiency. The implementation steps of the method are as follows: 1, setting a parameter and initializing the parameter; 2, calculating Lagrangian multiplier Tau meeting an average transmission power constraint condition and Lagrangian multiplier Mu meeting an average interference power constraint condition; 3, calculating the transmission power Pn after perform n iterations according to the multiplier Tau and the multiplier Mu; 4, separately calculating an energy efficiency function fn (eta) and energy efficiency eta n while the transmission power is Pn; 5, judging the energy efficiency function fn (eta), and obtaining optimal energy efficiency and optimal transmission power under the optimal energy efficiency if an iteration stopping condition is met, otherwise continuing to circulate until the condition is met or the maximum iterations are met to obtain the optimal energy efficiency and the optimal transmission power at this time. The method of the invention could maximize the energy efficiency, and needs few steps to stop the iteration. The method of the invention is easy to realize and could be applied to wireless communication.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a power allocation method based on spectrum sharing to maximize energy efficiency, which can be used for power allocation to maximize energy efficiency of secondary users in a green cognitive radio system. Background technique [0002] With the rapid development of wireless and mobile communications, the contradiction between the increasing demand for wireless spectrum and the limited spectrum resources has become a prominent contradiction in the current wireless communication industry. The phenomenon of extremely low utilization rate. In order to improve the current situation of low spectrum utilization, J.Mitola et al. proposed the concept of cognitive radio, the main idea of ​​which is to allow secondary users to access in the authorized frequency band without affecting the normal communication of primary users. to the current frequency band, thereby greatly impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/34H04W72/04H04W72/08
CPCH04W52/34H04W72/0473H04W72/541
Inventor 李赞周福辉唐烨关磊郝本健熊天意胡伟龙齐佩汉司江勃刘伯阳杨鼎
Owner XIDIAN UNIV
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