公开(公告)号：US20240094406A1

公开(公告)日：2024-03-21

申请号：US18209201

申请日：2023-06-13

Applicant: BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS

Inventor： Zhiyong FENG ,  Sai HUANG ,  Jingchun LI ,  Yiliang CHEN ,  Ping ZHANG ,  Shuo CHANG

IPC: G01S19/21 ,  G01S19/42

CPC classification number: G01S19/21 ,  G01S19/42

Abstract: The present invention provides a GPS interference source positioning method, apparatus, electronic device, and readable storage medium, which relates to the technical field of wireless communications. The method includes: acquiring a first signal strength of a GPS interference signal received by a flight device at a first moment, and acquiring a second signal strength of a GPS interference signal received by the flight device at a second moment, wherein the first moment refers to a starting moment when a position of the flight device cannot be acquired, and the second moment refers to a starting moment when the position of the flight device can be re-acquired, the GPS interference signal is sent by a GPS interference source located at a ground point; acquiring a confidence of each ground point in a set of ground points as a positioning point of the GPS interference source according to the first signal strength and the second signal strength; acquiring a predicted positioning point of the GPS interference source from the set of ground points according to the confidence. The solution of the present invention can improve the positioning accuracy of the GPS interference source.

公开(公告)号：US20250008467A1

公开(公告)日：2025-01-02

申请号：US18481078

申请日：2023-10-04

Applicant: BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS

Inventor： Zhiyong FENG ,  Xu CHEN ,  Ping ZHANG ,  Zhiqing WEI ,  Qixun ZHANG ,  Sai HUANG

IPC: H04W64/00 ,  H04L5/00

Abstract: The embodiments of the present invention provide a user equipment positioning method, apparatus, a base station and a storage medium, and relates to the technical field of wireless communication. The method is applied to a base station and comprises: receiving a pilot signal sent by a target UE; calculating a CSI estimation value of a channel between the base station and the target UE according to the received pilot signal; calculating transmission directions of the pilot signal along different signal paths according to the CSI estimation value to obtain AoA estimation values; performing directional beamforming based on the AoA estimation values to generate a spatially filtered CSI estimation value; performing Kalman filtering on the spatially filtered CSI estimation value to generate an enhanced CSI estimation value; calculating transmission distances of the pilot signal transmitted along different signal path according to the enhanced CSI estimation value to obtain distance estimation values; determining a position of the target UE according to a minimum distance estimation value among the distance estimation values and an AoA estimation value corresponding to the minimum distance estimation value. The solutions provided by the embodiments of the present invention can improve the accuracy of UE positioning.

公开(公告)号：US20210352545A1

公开(公告)日：2021-11-11

申请号：US17267717

申请日：2018-09-29

Applicant: Beijing University of Posts and Telecommunications

Inventor： Qixun ZHANG ,  Zhiyong FENG ,  Mengyuan LIU ,  Sai HUANG ,  Zhiqing WEI ,  Yibo HUAN

IPC: H04W36/00

Abstract: Disclosed are a method and an apparatus for handover between heterogeneous networks. The method comprises: obtaining, for each of a plurality of candidate networks, parameters of the candidate network including a packet loss rate and a network load, and taking the obtained parameters as decision parameters of the candidate network; obtaining each of preset service types and a preset weight factor for at least one user preference corresponding to the preset service type; calculating weights of decision parameters for each preset service type by using the decision parameters of the candidate network and through an Analytic Hierarchy Process, and determining a weight vector for the preset service type; adjusting the weight vector for each preset service type by using the preset weight factor; calculating, using the weight vector and through an intuitionistic trapezoidal fuzzy multi-attribute decision-making algorithm, a score for each of the candidate networks, determining the candidate network with the highest score as a target network, and triggering a handover.

公开(公告)号：US20240039590A1

公开(公告)日：2024-02-01

申请号：US18026433

申请日：2021-12-27

Applicant: Beijing University Of Posts and Telecommunications

Inventor： Qixun ZHANG ,  Zhiyong FENG ,  Huan SUN ,  Ping ZHANG ,  Zhiqing WEI ,  Sai HUANG ,  Yifan ZHANG

IPC: H04B7/06 ,  H04B7/08

CPC classification number: H04B7/0617 ,  H04B7/086

Abstract: A broadband millimeter wave beam tracking method based on vehicle movement trajectory recognition, which relates to the field of wireless communication. First, a rough estimate of the beam angle is obtained according to the position and attitude of two vehicles in a communication scenario at an initial moment, and a state of the vehicle is judged according to the sudden change rate of the transmitting beam angle starting from a next moment; if it is in the sudden change mode, the observation value ŷk of the received signal is calculated; if it is in the smooth change mode, the observation value I is calculated; the observation values in different modes are input into an improved particle filter algorithm for fine beam estimation, to obtain optimal values xk and uk; and the beam optimal values at the current moment are used to re-estimate a pair of the forming vector of the transmitting beam and the forming vector of the receiving beam to adjust the vehicle and the pilot signal at the next moment is transmitted; by continuously adjusting the beam forming vector at each moment, a beam tracking within an error range is obtained. The present application improves the accuracy and reliability of beam tracking in case of sudden angle change.

公开(公告)号：US20230396482A1

公开(公告)日：2023-12-07

申请号：US18245762

申请日：2021-07-19

Applicant: Beijing University of Posts and Telecommunications

Inventor： Zhiyong FENG ,  Sai HUANG ,  Yifan ZHAO ,  Qixun ZHANG ,  Zhiqing WEI

IPC: H04L27/26 ,  H04L5/00

CPC classification number: H04L27/2675 ,  H04L27/2666 ,  H04L5/0048

Abstract: Embodiments of the present invention provide a signal processing method and apparatus, a first device determines a target insertion position of a pilot sequence in a first frequency-domain signal based on the data bits in a first sub-data signal obtained by dividing data bits in a data signal, combines the pilot sequences with a second sub-data signal obtained by dividing the data signal according to the determined target insertion positions, to obtain the first frequency-domain signal; sends the pulse signal corresponding to the first frequency-domain signal to the second device. The second device determines the pilot sequences in the first frequency-domain signal corresponding to the pulse signal and determines the data bits corresponding to the insertion position of each of the pilot sequences in the first frequency-domain signal, to obtain the first sub-data signal; demodulates subcarriers in the first frequency-domain signal other than the pilot sequences, to obtain the second sub-data signal; splices the first sub-data signal and the second sub-data signal, to obtain the corresponding data signal. Based on the above processing, spectrum resource utilization rate can be improved.