Unmanned aerial vehicle millimeter wave beam forming design method based on partially connected antenna array

Abstract

The invention discloses an unmanned aerial vehicle millimeter wave beam forming design method based on a partially connected antenna array, and the method comprises the steps: obtaining channel matrix estimation values corresponding to a plurality of unmanned aerial vehicle users, and determining an unmanned aerial vehicle merging vector corresponding to each unmanned aerial vehicle user according to the channel matrix estimation values; constructing a beam forming gain relational expression and an unmanned aerial vehicle user total interference relational expression according to the unmanned aerial vehicle merging vector and the channel matrix estimated value; constructing a positive semidefinite programming problem according to the beam forming gain relational expression and the unmanned aerial vehicle user total interference relational expression, and determining an analog beam forming vector based on the positive semidefinite programming problem; and determining a beam forming design result according to the analog beam forming vector. According to the design method, interference among users is reduced while the beam forming gain is maximized, the higher user rate is achieved, the beam forming gain and the total interference of the unmanned aerial vehicle users are represented based on the channel matrix estimated value, and the problem that beam forming cannot be designed by directly adopting angle domain information is solved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a design method for millimeter-wave beamforming of an unmanned aerial vehicle based on partially connected antenna arrays. Background technique [0002] The millimeter-wave band is rich in spectrum resources and can be used to support ultra-high-speed UAV communication. In order to utilize millimeter-wave multi-antenna transmission diversity, beamforming design can be used in millimeter-wave base stations. Due to the limitations of the front-end hardware of the radio-frequency chain (RFchain), all-digital beamforming cannot be integrated on the small antenna array of the UAV millimeter wave. Hybrid beamforming based on a partially connected antenna array structure is a feasible alternative. In this solution, in addition to achieving transmission diversity, the partially connected antenna structure has lower cost and higher energy efficiency and spectrum efficiency ...

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Problems solved by technology

[0005] Aiming at the above-mentioned defects of the prior art, the present invention provides a design method of millimeter-wave beamforming for UAVs based on partially connected antenna arrays, aiming to solve the problem that traditional beamforming design schemes cannot simultaneously satisfy the requirements of maximizing beamforming gain and minimum user interval. Interference design requirements, and the problem of not being able to directly use angle domain information to design beamforming

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