Broadband large-scale MIMO (Multiple Input Multiple Output) system-based wireless positioning method and system

A wireless positioning system and wireless positioning technology, applied in the transmission system, wireless communication, radio transmission system, etc., to achieve the effect of improving robustness and efficiency

Active Publication Date: 2018-01-16
SOUTHEAST UNIV
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Problems solved by technology

[0004] The wireless positioning method based on position fingerprint information can fully exploit the influence of the scatterer environment on the channel characteristics, and is currently widely studied for wireless positioning in complex scatterer environments. However, most of the existing position fingerprint information extraction methods use the received signal strength, Limited channel characteristics such as angle of arrival and delay of arrival

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  • Broadband large-scale MIMO (Multiple Input Multiple Output) system-based wireless positioning method and system
  • Broadband large-scale MIMO (Multiple Input Multiple Output) system-based wireless positioning method and system
  • Broadband large-scale MIMO (Multiple Input Multiple Output) system-based wireless positioning method and system

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[0042] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0043] Such as figure 1 As shown, a wireless positioning method for a broadband massive MIMO system disclosed in the embodiment of the present invention mainly includes: (1) in the offline stage, the base station cooperates with the offline sampling mobile terminal to measure the location fingerprints of the feature points delineated at c...

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Abstract

The present invention provides a broadband large-scale MIMO (Multiple Input Multiple Output) system-based wireless positioning method and system. According to the wireless positioning method and system, the spatial angle resolution of a large-scale MIMO systems and the delay resolution of a wideband system are adopted, so that a base station side can extract an angle and delay-domain channel energy matrix from uplink channel estimation results and adopt the matrix as position fingerprint information. In an offline phase, the base station cooperates with an offline sampling mobile terminal to measure the position fingerprint information of feature points which are obtained by dividing the coverage area of a cell at intervals, stores position coordinates corresponding to the position fingerprint information into the database and hierarchically clusters the position fingerprint information in the database. In an online phase, the base station side hierarchically compares the position fingerprint information of a mobile terminal to be positioned with the position fingerprint information in the database, calculates the position coordinates of the mobile terminal to be positioned and feeds back the position coordinates to the corresponding mobile terminal. The method and system, by means of wireless communication devices, can significantly improve the positioning accuracy of the mobile terminal under complex scattering body environments such as urban buildings and indoor environments.

Description

Technical field: [0001] The present invention relates to a wireless positioning method and system for a wideband massive MIMO system, in particular to a wireless positioning method and system for utilizing the channel characteristics of the time delay domain of the wideband massive MIMO system based on a fingerprint database. Background technique: [0002] Wideband massive MIMO system has significant advantages in improving the spectrum efficiency and power efficiency of wireless communication systems, and is one of the key technologies for future 5G wireless communication. The base station side obtains extremely high spatial angle resolution by configuring a large-scale antenna array; by using Orthogonal Frequency Division Multiplexing (OFDM) technology, the broadband channel is decomposed into multiple parallel narrowband channels to obtain extremely high delay resolution force. The broadband massive MIMO system combines the advantages of the two technologies to achieve h...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W64/00H04B7/0413
Inventor 高西奇孙晓宇韩伟
Owner SOUTHEAST UNIV
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