An optimization method for UAV relay transmission efficiency based on decoupling of optimization variables

Abstract

The invention discloses a method for optimizing the relay transmission efficiency of unmanned aerial vehicles based on the decoupling of optimization variables, and relates to the relay transmission technology of unmanned aerial vehicles. Firstly, an air-to-ground two-way relay transmission scenario including an air base station, an air relay and a ground base station is constructed. The air base station and the ground base station are used as two source nodes, and simultaneously send signals to the air relay as a receiving node at the same frequency. Then, using the transmit power and signal-to-noise ratio of each node, a relay transmission energy efficiency optimization problem model is established, and the energy efficiency optimization problem model is decoupled into a power sub-optimization problem and an air relay location sub-optimization problem. Finally, the idea of ​​alternating minimization is used to iterate the power sub-optimization problem and the air relay position sub-optimization problem respectively, and a set of solutions that minimize the objective function is output as the final solution. The invention reduces the solution complexity of the original energy efficiency optimization problem and ensures the robustness of the solution of the energy efficiency optimization problem.

Description

technical field [0001] The invention relates to unmanned aerial vehicle relay transmission technology, and specifically refers to a method for optimizing relay transmission performance of unmanned aerial vehicles based on optimization variable decoupling, which is applicable to the optimization of relay transmission performance of different types of unmanned aerial vehicles. Background technique [0002] The UAV relay transmission system refers to the data communication system in which the UAV performing the mission completes the information transmission with the ground control center by means of the relay UAV. The UAV relay transmission system has become an information bridge for resource sharing between the UAV and the shipboard, ground command platform or equipment during the whole flight process of the UAV. The relay UAV and the ground control center establish a relay link, and send information such as images acquired by the UAV airborne mission sensor to the ground cont...

AI Technical Summary

Problems solved by technology

[0007] In the two ways, the relay nodes process information differently, resulting in different interrupt performance

Existing literature research shows that the decoding and forwarding performance is better than the amplification and forwarding performance in the case of low signal-to-noise ratio, but the performance of the two methods is similar in the case of high signal-to-noise ratio

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