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Accurate positioning method based on linear frequency modulation continuous wave technology and accurate positioning devices based on linear frequency modulation continuous wave technology

A linear frequency modulation and precise positioning technology, which is applied in the direction of radio wave reflection/re-radiation, radio wave measurement system, and utilization of re-radiation, can solve problems such as inability to function, and achieve the goal of offsetting hardware timing differences and improving ranging accuracy Effect

Active Publication Date: 2014-02-05
SHENZHEN YIRI TECH
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Problems solved by technology

[0002] Common positioning systems, such as the US Global Positioning System (GPS), can only work in large-scale open space environments, but cannot play a role in indoor positioning fields, such as mines, buildings, tunnels, forests and other complex environments

Method used

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  • Accurate positioning method based on linear frequency modulation continuous wave technology and accurate positioning devices based on linear frequency modulation continuous wave technology
  • Accurate positioning method based on linear frequency modulation continuous wave technology and accurate positioning devices based on linear frequency modulation continuous wave technology
  • Accurate positioning method based on linear frequency modulation continuous wave technology and accurate positioning devices based on linear frequency modulation continuous wave technology

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] figure 1 The reference numerals in are: frequency sweep signal generation module 1; first switch 2; power amplifier 3; antenna 4; low noise amplifier 5; mixer 6; analog-to-digital converter 7; timing detection module 8; processing module 9 ; the wireless signal module 10 ; the human-computer interaction module 11 ; the second switch 12 .

[0050] The present invention uses chirp frequency modulated continuous wave (FMCW) as the ranging signal. Frequency-modulated continuous wave (FMCW) is a signal whose frequency changes linearly and continuously with time. Usually, the frequency sweep duration of FMCW is much longer than the flight time of the signal.

[0051] A precise positioning method based on chirp continuous wave technology, which uses chirp continuous wave as the ranging signal, and a chirp continuous wave x(t) in the form of u...

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Abstract

The invention relates to an accurate positioning method based on the linear frequency modulation continuous wave technology, and accurate positioning devices based on the linear frequency modulation continuous wave technology. The accurate positioning method based on the linear frequency modulation continuous wave technology includes the following steps that in the one-time distance measurement process, the device B transmits linear frequency modulation continuous wave signals, the device A receives the signals, both the device A and the device B generate linear frequency modulation continuous wave signals periodically, and supposing that local oscillators at the two ends of the device A and the two ends of the device B have fixed difference t0, the oscillators of the device A are in front of the oscillators of the device B, the flying time of the linear frequency modulation continuous wave signals in air is tau, and the signals received by the device A are the signals transmitted by the device B and having been delayed in the air for the time of tau. The invention further provides the accurate positioning devices based on the linear frequency modulation continuous wave technology. The method and the devices have the advantage that on the basis of the accurate positioning technology of the FMCW technology, accurate measurement between two points is achieved by measuring the flying time of radio waves in the air.

Description

technical field [0001] The invention relates to a positioning method, in particular to a precise positioning method and equipment based on linear frequency modulation continuous wave technology. Background technique [0002] Common positioning systems, such as the US Global Positioning System (GPS), can only work in large-scale open space environments, but cannot function in indoor positioning areas such as complex environments such as mines, buildings, tunnels, and forests. Contents of the invention [0003] In order to solve the problems in the prior art, the present invention provides a precise positioning method and equipment based on chirp continuous wave technology. [0004] The present invention provides a precise positioning method based on chirp continuous wave technology, using chirp continuous wave as the ranging signal, and a chirp continuous wave x(t) in the form of an up-sweep frequency is described as: [0005] x ( ...

Claims

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Application Information

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IPC IPC(8): G01S13/74
CPCG01S11/02
Inventor 崔荣涛翁凯利刘晓宇任普耀文智力
Owner SHENZHEN YIRI TECH
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