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Direct path extraction method and device

An extraction method and direct path technology, applied in location information-based services, channel estimation, electrical components, etc., can solve problems such as large errors, wireless positioning multipath interference, etc., and achieve the effect of improving accuracy

Active Publication Date: 2018-07-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to the direct path extraction and device provided by the embodiment of the present invention, by finding the direct path in the multipath signal, it solves the problem of large errors caused by multipath interference in wireless positioning in complex environments

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  • Direct path extraction method and device

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Embodiment Construction

[0043] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0044] figure 1 is a block diagram of the method for extracting direct ray paths provided by the embodiments of the present invention, such as figure 1 As shown, the steps include:

[0045] Step S101: the base station receives a positioning reference signal from a terminal.

[0046] Step S102: the base station uses the received positioning reference signal and the local positioning reference signal to perform channel estimation to obtain a channel estimation value.

[0047] Specifically, the base station performs least squares (Least Square, LS) channel estimation on the received positioning reference signal and the local positioning reference signal to...

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Abstract

The invention discloses a direct path extraction method and device and relates to the field of wireless positioning. The method includes the following steps: a base station receives a positioning reference signal from a terminal; the base station carries out a channel estimation and obtains a channel estimate by utilizing the received positioning reference signal and a local positioning referencesignal; the base station determines an energy window of the channel estimate and energy distributed in the energy window by utilizing the channel estimate; and the base station determines a direct path according to the energy distributed in the energy window and extracts the direct path. According to the embodiments of the invention, the direct path is determined and extracted according to the energy distribution in the energy window. Signal transmission time delay of the real direct path can be effectively approximated, and the precision of the wireless positioning can be improved.

Description

technical field [0001] The invention relates to the field of wireless positioning, in particular to a method and device for extracting a direct beam path. Background technique [0002] With the development of mobile Internet, people's demand for positioning and navigation functions will become higher and higher. Outdoor positioning technology represented by Global Positioning System (GPS) and Beidou has been widely used, but in complex indoor or closed environments, such as large waiting rooms, large venues, stadiums, large office buildings, underground mines, etc. The scene still cannot be located due to severe signal occlusion and attenuation. However, these complex indoor environments require the communication network to meet hotspot coverage anytime and anywhere, so the communication system base station can be used for indoor positioning. [0003] Time of Arrival (TOA) and Time Difference of Arrival (TDOA) positioning methods based on the principle of triangulation are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04W4/02H04W64/00
CPCH04L25/0202H04L25/024H04W4/023H04W64/00H04L25/02H04W4/02
Inventor 向平叶
Owner ZTE CORP