Power Allocation Method with Maximum Energy Efficiency Based on Spectrum Sharing

Abstract

The invention discloses a power allocation method based on frequency spectrum sharing with maximum energy efficiency, which solves the problem that the existing cognitive radio power allocation method cannot obtain maximum energy efficiency. The implementation steps are: 1. Setting parameters and initializing them; 2. Obtaining the Lagrange multiplier τ satisfying the constraint condition of the average transmission power and the Lagrange multiplier μ satisfying the constraint condition of the average interference power; 3. Calculate the transmission power Pn after the nth iteration according to the multiplier τ and μ; 4. calculate respectively the energy efficiency function fn (η) and energy efficiency ηn when the transmission power is Pn; 5. perform the energy efficiency function fn (η) Judgment, if the iteration stop condition is satisfied, the best energy efficiency and the best transmit power under the best energy efficiency are obtained, otherwise, the loop continues until the condition is met or the maximum number of iterations is reached, and the best energy efficiency and optimal transmit power at this time are obtained. The invention has the advantages of maximizing energy efficiency, less steps required for iteration stop, and easy realization, and can be used for 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...

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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