Wireless energy-carrying NOMA cooperative network power optimization method

Abstract

The invention belongs to the field of wireless physical layers, discloses a wireless energy-carrying NOMA cooperative network power optimization method, and mainly solves the problem of insufficient energy supply of secondary user nodes in an existing NOMA cooperative cognitive radio network. The implementation scheme comprises the following steps: firstly, constructing a NOMA (Non-Orthogonal Multiple Access) cooperative network model based on a radio frequency energy collection technology, and simultaneously receiving signals and radio frequency energy at a secondary user receiver by adoptinga power division architecture; a. An improved genetic algorithm is designed to optimize the power distribution factor and the time slot distribution factor of the model so as to maximize the throughput of the secondary user system. According to the invention, the optimal power distribution factor and time slot distribution factor are obtained, the improvement of the system spectrum efficiency andthe improvement of the energy efficiency of the secondary user system are realized, the service life of the secondary user node is prolonged, and the transmission performance of the whole system is improved.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a NOMA cooperative network power optimization method with wireless energy carrying. Background technique [0002] Cognitive radio technology can perceive changes in the external environment dynamically, and change parameters such as transmission power and carrier frequency in real time, so as to achieve high spectrum utilization. It is applied to many typical scenarios, such as: Ad Hoc network, Mesh network, etc. . Therefore, proposing the NOMA scheme in the cognitive radio scenario has important research significance for 5G systems that use spectrum resources more efficiently. In addition, green communication is one of the goals of 5G communication technology. In a network with limited node energy, it is also an urgent problem to significantly improve system performance without increasing system energy consumption. [0003] The concept of NOMA was first propos...

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Problems solved by technology

[0006] At present, the research in the cognitive radio network of NOMA cooperation is more on the realization of system throughput and improvement of spectrum utilization, and the problem of energy-constrained nodes has not been considered.

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