Power distribution method based on maximum outage probability energy efficiency

A distribution method and energy efficiency technology, applied in the direction of energy consumption reduction, advanced technology, network planning, etc., can solve the problems of energy waste, can not guarantee the maximum energy efficiency of secondary users, etc.

Active Publication Date: 2015-10-28
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

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  • Power distribution method based on maximum outage probability energy efficiency
  • Power distribution method based on maximum outage probability energy efficiency
  • Power distribution method based on maximum outage probability energy efficiency

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Embodiment Construction

[0042] refer to figure 1 , the implementation steps of the present invention are as follows:

[0043] Step 1: Cognitive users set target parameters.

[0044] The secondary user sets the energy efficiency function error tolerance ξ>0 and the interruption capacity r s Bits / complex dimension, the maximum number of iterations N, the convergence error ξ corresponding to the average transmit power constraint 1 >0, the convergence error ξ corresponding to the average interference power constraint 2 >0, the Lagrangian multiplier iteration step size t corresponding to the average transmit power constraint 1 >0, the Lagrangian multiplier iteration step size t corresponding to the average interference power constraint 2 >0;

[0045] 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 average transmit power constraint, the channel fading state, and t...

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Abstract

The invention discloses a power distribution method based on maximum outage probability energy efficiency and mainly solves a problem that a conventional cognitive radio power distribution method cannot acquire energy efficiency maximization. The method comprises steps of: 1 setting and initializing a parameter; 2 solving a Lagrange multiplier [tau] satisfying an average sending power constraint condition and a Lagrange multiplier [mu] satisfying an average interference power constraint condition; computing sending power Pn based on an outage probability after the nth iteration according to the multipliers [tau] and [mu]; 4 computing an energy efficiency function fn ([eta]) and energy efficiency [eta]n when the sending power is Pn; and 5, determining the energy efficiency function fn ([eta]), and acquiring the optimum energy efficiency and the optimum sending power under the optimum energy efficiency if the energy efficiency function fn ([eta]) satisfies an iteration stop condition, or continuing the cycle until the energy efficiency function fn ([eta]) satisfies the iteration stop condition or the maximum iteration number is achieved, thereby obtaining the optimum sending power and the optimum sending power. The power distribution method has advantages of maximum energy efficiency, a few iteration stop steps, and easy implement, and can be used in wireless communication.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a power allocation method based on maximum outage probability energy efficiency, which can be used for power allocation of secondary user energy efficiency maximum 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 great...

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Application Information

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IPC IPC(8): H04W16/14H04W72/04
CPCH04W16/14H04W72/0473Y02D30/70
Inventor 周福辉李赞唐烨司江勃郝本健熊天意杨鼎刘向丽黄海燕胡伟龙刘伯阳
Owner XIDIAN UNIV
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