Power allocation method with maximum energy efficiency based on outage probability

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...

AI Technical Summary

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

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