Mobile device location estimation method based on multi-base station channel state information fusion
A technology of channel state information and mobile devices, applied in channel estimation, baseband system, wireless communication, etc., can solve the problem of low time synchronization accuracy, achieve automatic operation, reduce energy consumption, and reduce manual participation.
Active Publication Date: 2022-07-29
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
[0004] Technical problem: In view of the existing mobile device positioning methods, which require high time synchronization accuracy between base stations and manual site surveys to achieve effective positioning, the present invention provides a mobile device position estimation based on multi-base station channel state information fusion method, which can realize mobile positioning and tracking under the conditions of low base station time synchronization accuracy and unsupervised conditions
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[0055] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.
[0056] figure 1 A multi-base station mobile positioning scenario to which the present invention is applicable is shown; wherein, the number of base stations is B, and the base station has multiple antennas, and the number of the base stations is b∈{1,2,...,B}; each base station is configured with Linear array with the same number of array elements, the number of array elements is N; the mobile device has a single antenna and is an omnidirectional antenna; during the operation of the wireless network, the mobile device sends a pilot signal with a fixed power to the base station for network uplink. Link channel estimation; the pilot signal contains device identification (ID) information and its transmission time information.
[0057] figure 2 The specific flow of an embodiment of the present invention is shown, and the specific steps are as follows...
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The invention discloses a method for estimating the position of a mobile device based on the fusion of channel state information of multiple base stations, and belongs to the technical field of radio mobile positioning. Including the base station collecting non-real-time channel state information samples from mobile devices; extracting angular domain power spectrum channel characteristics; The single base station sample difference degree matrix is fused to obtain a global sample difference degree matrix; the data fusion node constructs a channel map for the sample data set according to the global sample difference degree matrix, and calibrates the channel map; the base station collects real-time channel state information from mobile devices , combined with the sample data set and the channel map for matching and positioning to obtain the real-time location information of the mobile device. The present invention does not require precise time synchronization between base stations, does not require on-site survey, reduces manual participation, and realizes automatic operation of the mobile positioning system.
Description
technical field [0001] The invention belongs to the technical field of radio mobile positioning, and in particular relates to a method for estimating the position of mobile equipment based on the fusion of channel state information of multiple base stations. Background technique [0002] Mobile location information acquisition technology is the key support for building a smart city. By sensing and collecting the spatiotemporal location information of people, logistics, vehicles and other various IoT devices, it can be used for automatic management of wireless network spectrum resources, automatic driving, smart city lighting, Provide basic data for application scenarios such as smart logistics, smart security, mobile Internet social networking, and social situational awareness. [0003] With the application of technologies such as massive multiple-input multiple-output (massive MIMO), ultra-dense networking, and ultra-broadband in 5G mobile networks, 5G base stations have st...
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IPC IPC(8): H04W64/00H04L25/02
CPCH04W64/003H04L25/0202H04L25/0242
Inventor 邓俊荃张建照秦新蕊乔晓强
Owner NAT UNIV OF DEFENSE TECH