Hybrid precoding and position design method for large-scale MIMO unmanned aerial vehicle system

Abstract

The invention provides a hybrid precoding and position design method for a large-scale MIMO unmanned aerial vehicle system. The method comprises the following steps: firstly, designing a hovering position of an unmanned aerial vehicle according to a user position and system parameters; designing a hybrid precoding according to the channel information between the base station and the user; and finally, optimizing the distribution scheme of the transmitting power of each user. The hybrid precoding structure is used in the unmanned aerial vehicle system, so that the complexity and the power burden of the system can be effectively reduced, the large-scale MIMO technology can be used in the unmanned aerial vehicle system, the spectrum efficiency and the energy efficiency can be remarkably improved, and the space multiplexing gain is greatly improved. In addition, the invention also provides the optimal hovering position of the unmanned aerial vehicle, on the premise of meeting the spectrumefficiency requirement of each user, the transmitting power of the system is reduced, and the performance of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a precoding design and a position optimization method in an unmanned aerial vehicle multi-antenna system, and in particular to a large-scale multiple-input multiple-output (MIMO) mixed-input multiple-output (MIMO) unmanned aerial vehicle system Design approach for precoded and hover positions. Background technique [0002] Traditional ground base stations often have fixed locations, and in practical applications often cannot provide communication services to all users due to the obstruction of other buildings. In contrast, UAV-assisted wireless communication can provide economical wireless network connections in areas without infrastructure coverage; the high mobility of UAVs can also provide temporary services to users in a wide area. In addition, drones can also establish direct communication links in most scenarios, which can provide users with better communication channe...

AI Technical Summary

Problems solved by technology

The first is that large-scale antenna arrays are difficult to implement in UAV systems due to the size and weight limitations of UAVs

On the other hand, the design problem of jointly designing precoding and location for UAV system has many design parameters and the design problem is very complex

Existing technology still can't overcome above-mentioned difficult problem

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