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Radio-frequency signal distance measurement method and system

A technology of radio frequency signal and ranging method, which is applied in the field of positioning and can solve the problems of low radio frequency positioning accuracy

Inactive Publication Date: 2016-05-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a radio frequency signal ranging method and system to solve the problems existing in the prior art that the existing radio frequency positioning accuracy is low and hardware chips are required to support RSSI measurement

Method used

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  • Radio-frequency signal distance measurement method and system

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Embodiment 1

[0059] see figure 1 As shown, a radio frequency signal ranging method provided by an embodiment of the present invention includes:

[0060] S1: Obtain a relationship table between the occurrence probabilities of different ranging codewords and the distance between nodes, where the distance between nodes is the distance between the transmitting node and the receiving node;

[0061] S2: Transmitting a ranging packet sequence through the transmitting node, the ranging packet sequence includes: a plurality of packets of different levels of radio frequency transmission power, and the content of the packet includes the radio frequency transmission power information of the group;

[0062] S3: Receive the packet transmitted by the transmitting node through the receiving node, and construct a ranging codeword according to the receiving result of the receiving node;

[0063] S4: Estimate the distance between the transmitting node and the receiving node according to the constructed rang...

Embodiment 2

[0119] The present invention also provides a specific implementation of a radio frequency signal ranging system. Since the radio frequency signal ranging system provided by the present invention corresponds to the specific implementation of the aforementioned radio frequency signal ranging method, the radio frequency signal ranging system can perform the above-mentioned The process steps in the specific implementation of the method are used to achieve the purpose of the present invention. Therefore, the explanations in the specific implementation of the radio frequency signal ranging method are also applicable to the specific implementation of the radio frequency signal ranging system provided by the present invention. In the present invention Details will not be described in the following specific implementation manners.

[0120] The embodiment of the present invention also provides a radio frequency signal ranging system, including:

[0121] An acquisition unit, configured t...

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Abstract

The invention provides a radio-frequency signal distance measurement method and system which are capable of estimating a distance between an emission node and a receiving node on the premise of independence of radio-frequency receiving signal intensity measurement hardware. The method comprises the steps of: obtaining a relation table between occurance probabilities of different distance measurement codons and a distance between nodes, wherein the distance between the nodes is the distance between the emission node and the receiving node; emitting a distance measurement grouping row through the emission node, wherein the distance measurement grouping row comprises a plurality of groups of different radio-frequency emission power levels, and the grouping content includes radio-frequency emission power information of the group; receiving the groups emitted by the emission node through the receiving node, constructing the distance measurement codon according to the receiving result of the receiving node; estimating the distance between the emission node and the receiving node according to the constructed distance measurement codon and the obtained relation table between the occurance probabilities of different distance measurement codons and the distance between the nodes. The radio-frequency signal distance measurement method and system are applicable to the technical field of positioning.

Description

technical field [0001] The present invention relates to the technical field of positioning, in particular to a radio frequency signal ranging method and system. Background technique [0002] Unlike outdoor positioning, indoor positioning technology faces great challenges due to the lack of indoor GPS signals. In order to solve this problem, various indoor positioning technologies have been proposed one after another. Due to the variety of indoor environments, such as airport halls, exhibition halls, supermarkets, libraries, underground parking lots, mines, etc., different indoor positioning technologies have emerged as the times require, with different functions and advantages and disadvantages. [0003] Radio frequency positioning is a means of indoor positioning. In the prior art, radio frequency positioning is mainly based on radio frequency connectivity or radio frequency signal strength. The former belongs to the "non-ranging" positioning method. It is usually assumed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
CPCG01S5/02
Inventor 皇甫伟邢逸康何杰
Owner UNIV OF SCI & TECH BEIJING
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