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Terminal location method based on time delay estimation of narrowband internet of things

A narrowband Internet of Things and delay estimation technology, applied in baseband systems, baseband system components, transmission monitoring, etc., can solve problems such as inter-cell interference, multipath effects, and low sampling rates

Active Publication Date: 2020-05-05
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, in the prior art, the delay estimation in NB-IoT terminal positioning has problems such as inter-cell interference, multipath effect and low sampling rate.

Method used

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  • Terminal location method based on time delay estimation of narrowband internet of things
  • Terminal location method based on time delay estimation of narrowband internet of things
  • Terminal location method based on time delay estimation of narrowband internet of things

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Embodiment Construction

[0057] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0058] It can be understood that the terminal in the present invention is also a user terminal.

[0059] Embodiments of the invention will be further described below in conjunction with the accompanying drawings. A terminal positioning method based on narrowband Internet of Things time delay estimation of the present invention, comprising:

[0060] positioning principle

[0061] This solution mainly considers the delay estimation based on OTDOA positioning. figure 2 It is a positioning schematic diag...

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Abstract

The invention relates to a wireless communication technology, in particular to a terminal positioning method based on time delay estimation of narrow band Internet of Things. The method comprises thefollowing steps that a specific positioning reference signal of a downlink of the narrow band Internet of Things is utilized to carry out frequency domain correlation, first arrival path search, timedomain interpolation and time domain correlation on a local reference signal and a receiving reference signal in sequence, a time delay is estimated and time delay estimation precision is gradually improved; and meanwhile, a continuous interference elimination algorithm and a first arrival path search algorithm are respectively introduced in order to eliminate inter-cell interference and inhibit anon-line-of-sight influence, so that the accurate time delay estimation is realized, and thus the technical effect of improving the positioning accuracy is achieved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a terminal positioning method based on Narrow Band Internet of Things (NB-IoT) delay estimation. Background technique [0002] NB-IoT mainly focuses on the low-power wide-coverage Internet of Things market, and is an emerging technology that can be widely used around the world. It connects simpler devices, features high coupling, low terminal cost, plug-and-play, high reliability, and unified business platform management. Networking application scenarios. This technology can perfectly match the market demand of Low Power Wide Area Network (LPWAN), enabling communication operators to enter this new field. With more and more new mobile devices such as mobile phones, tablet computers, wearable devices, etc., the performance of Internet of Things devices is increasing rapidly and the applications based on location awareness are proliferating, location awarene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04L25/02H04B17/364H04J11/00
CPCH04B17/364H04J11/005H04L25/0232H04W64/006
Inventor 唐宏牟泓彦雷曼王欣欣龚琴屈元远
Owner CHONGQING UNIV OF POSTS & TELECOMM