公开(公告)号：US20210367644A1

公开(公告)日：2021-11-25

申请号：US17393068

申请日：2021-08-03

Applicant: Beijing University of Posts and Telecommunications

Inventor： Wenjun XU ,  Jinglin ZHANG ,  Hui GAO ,  Zhiyong FENG ,  Zhi ZHANG ,  Jiaru LIN

IPC: H04B7/0426 ,  H04B7/0456 ,  H04W4/02 ,  H04B7/06

Abstract: Disclosed are methods for beam tracking. In the methods, a transmitting unmanned aerial vehicle (UAV) receives motion state information (MSI) of a receiving UAV and determines a first beam angle from the transmitting UAV to the receiving UAV according to the MSI of the receiving UAV. Then the transmitting UAV selects a codeword from a codebook according to the first beam angle. Finally, the transmitting UAV determines an activated sub-array and a beam-forming vector of the CCA according to the size of the activated sub-array corresponding to the sub-codebook to which the codeword belongs, a second beam angle corresponding to the codeword and a location of a central antenna element of an activated sub-array corresponding to the codeword and transmits information using the beam-forming vector. One or more examples of the present disclosure also provide a method for beam tracking implemented by the receiving UAV, methods for generating a codebook.

公开(公告)号：US20210003412A1

公开(公告)日：2021-01-07

申请号：US17023813

申请日：2020-09-17

Applicant: Beijing University of Posts and Telecommunications

Inventor： Wenjun XU ,  Chang DENG ,  Ping ZHANG ,  Zhi ZHANG ,  Hui GAO ,  Zhiyong FENG

IPC: G01C21/34 ,  G08G5/00 ,  G06K9/62 ,  G06N20/10 ,  H04L12/18 ,  B64C39/02

Abstract: Disclosed is a method of path optimization for an unmanned aerial vehicle (UAV). In the method, users and the positions of the users are obtained; the users are divided into K wireless multicast user groups; K initial hovering positions corresponding to the K wireless multicast user groups are determined; and a first shortest flying path connecting the K initial hovering positions is determined; and the initial hovering positions of the UAV are optimized to obtain K final hovering positions and a final flying path. The present disclosure also discloses a device of path optimization for a UAV and a computer readable storage medium.