Hybrid precoding and location design approach for massive mimo unmanned aerial systems

Abstract

The present invention provides a hybrid precoding and position design method for massive MIMO unmanned aerial vehicle system, including the following steps: first, design the hovering position of the unmanned aerial vehicle according to the user position and system parameters; then, according to the channel information between the base station and the user Design hybrid precoding; finally optimize the allocation scheme of each user's transmit power. The invention uses a hybrid precoding structure in the UAV system, which can effectively reduce the complexity and power burden of the system, so that the massive MIMO technology can be used in the UAV system, thereby significantly improving the spectrum efficiency and energy efficiency , so that the spatial multiplexing gain is greatly improved. In addition, the present invention also provides the optimal hovering position of the UAV, which reduces system transmission power and improves system performance on the premise of meeting the spectrum efficiency requirements of each user.

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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