An Indoor Positioning Method Based on Multilayer Satellite Signal Repeater

A satellite signal and indoor positioning technology, which is applied to satellite radio beacon positioning systems, instruments, measuring devices, etc., can solve the problems of poor positioning accuracy and achieve the effect of improving accuracy

Inactive Publication Date: 2019-04-23
DALIAN UNIV OF TECH
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Problems solved by technology

At present, the indoor positioning method based on the signal repeater mainly adopts pseudo-range positioning, the positioning accuracy is poor, and the measurement error can reach meter level

Method used

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  • An Indoor Positioning Method Based on Multilayer Satellite Signal Repeater
  • An Indoor Positioning Method Based on Multilayer Satellite Signal Repeater
  • An Indoor Positioning Method Based on Multilayer Satellite Signal Repeater

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Embodiment Construction

[0009] The specific implementation manners of the present invention will be further described below in conjunction with the technical solutions.

[0010] An indoor positioning method based on a multi-layer satellite signal repeater, the steps are as follows:

[0011] Navigation satellite signals are forwarded indoors through repeaters on two levels. When the repeater transmits the signal, in order to facilitate the receiver to identify which repeater the forwarded signal comes from, each repeater will delay the signal for a fixed period of time. Different repeaters have different delay times for the signal. If the repeater The delay of i to the signal is expressed by Δ i Indicates that |Δ i -Δ j |>(1+d c ) T c (i≠j), where d c is the correlator spacing, T c is the chip duration. In addition, the repeater needs to process the satellite signal so that the carrier phase remains unchanged after the signal is forwarded by the repeater, that is, the forwarding delay of the r...

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Abstract

The invention belongs to the field of electronic, communication and automatic control and discloses an indoor positioning method based on a multilayer satellite signal repeater. According to the indoor positioning method based on the multilayer satellite signal repeater, the multilayer satellite signal repeater is used for forwarding satellite signals indoors. At the same time, the satellite signals forwarded by the repeater and the signals from a differential reference station are received by a user receiver, and a difference operation is conducted on a phase measured by forwarding the satellite signals and a phase measurement value from the reference station to remove satellite clock errors, ephemeris errors and time delay errors between a ionized layer and a troposphere. Then, one time of difference operation is conducted on receivers of a front epoch and a back epoch and a single difference phase measurement value of the reference station again to obtain a carrier phase double-differenced measurement value without ambiguity, the measurement value comprises positions of a front epoch moment and a back epoch moment, and a plurality of repeaters are used for obtaining multiple items of values. Finally, on the basis of the measurement values, a combination equation is established, and position coordinates at the two epoch moments of a user are solved. According to the indoor positioning method based on the multilayer satellite signal repeater, the precision of indoor positioning by the usage of a navigation satellite signal can be further improved.

Description

technical field [0001] The invention belongs to the fields of electronics, communication and automatic control, and relates to user positioning based on navigation satellites, in particular to user positioning in blind areas of navigation satellite signals such as indoors. Background technique [0002] In blind areas of navigation satellite signals, such as inside buildings or tunnels and under viaducts, user receivers generally cannot directly obtain satellite signals, that is, they cannot directly use navigation satellite signals to calculate positions. In this case, if it is still necessary to use satellite signals to achieve positioning, it is necessary to amplify and forward the satellite signals through other devices located in areas with good satellite signals so that users in the blind area can receive effective satellite signals to achieve positioning, such as for indoor Satellite signal repeaters used for positioning, etc. At present, indoor positioning methods ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/41G01S19/44
CPCG01S19/41G01S19/44
Inventor 李秀魁
Owner DALIAN UNIV OF TECH
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