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A passive localization method based on the method of extracting the direct reflection path of the target

A passive positioning and reflection path technology, used in positioning, radio wave measurement systems, advanced technologies, etc., can solve the problems of increasing positioning costs, increasing data processing complexity, consuming a lot of labor and time costs, and reducing equipment costs. cost, reduce time cost, and improve the effect of real-time performance

Active Publication Date: 2022-07-12
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] (1) More transceivers (AP-MP pairs) are needed to increase the discrimination of the target's influence on the wireless signal;
[0007] (2) The existing indoor channel frequency response acquisition platforms all use the Ubuntu system computer equipped with Intel 5300 or Atheros 9380 wireless network card as the receiving end. When the number of receiving ends is increased, not only the complexity of data processing is increased, And greatly increased the cost of positioning;
[0008] (3) Whether it is a model-based method or a method based on building a location fingerprint database, it needs to consume a lot of labor and time costs to train parameters

Method used

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  • A passive localization method based on the method of extracting the direct reflection path of the target
  • A passive localization method based on the method of extracting the direct reflection path of the target
  • A passive localization method based on the method of extracting the direct reflection path of the target

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Embodiment Construction

[0065] The invention provides a passive positioning method based on the method of extracting the direct reflection path of the target. The LabVIEW virtual instrument software is used to remotely control the vector network analyzer, and only a pair of transceivers is needed to build an indoor channel frequency response acquisition platform, and the estimated target is directly The parameters of the reflection radius, that is, the equivalent azimuth and time delay.

[0066] Passive positioning is to examine the influence of the target on the wireless signal. The existence of the target will block the static multipath between some transceiver APs, and at the same time, a new mobile multipath will be generated through one or more reflections, in which only the target directly (or once) There is a definite geometric relationship between the reflection path and the target position. However, the direct reflection path of the target does not have the characteristic of minimum time dela...

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Abstract

The invention discloses a passive positioning method based on a method for extracting a direct reflection path of a target. The LabVIEW virtual instrument software is used to remotely control a vector network analyzer, and only a pair of transceivers is needed to build an indoor channel frequency response acquisition platform, and the estimated target is directly The parameters of the reflection radius, namely the equivalent azimuth and time delay. The invention can greatly reduce the time cost and equipment cost of the experiment, lays a foundation for the geometric passive positioning without the time-consuming and labor-intensive training process, and has high positioning real-time performance.

Description

technical field [0001] The invention belongs to the technical field of indoor positioning, and in particular relates to a passive positioning method based on a method for extracting a direct reflection path of a target. Background technique [0002] Positioning is a location-based service. According to different application scenarios, positioning systems can be divided into outdoor positioning and indoor positioning. GPS is currently the most widely used and developed outdoor positioning technology. The positioning accuracy of civilian GPS is about 10m, which can fully meet people's outdoor positioning needs. However, the indoor positioning situation is not optimistic, and there is currently no mature product application. It is suitable for indoor positioning, but indoor positioning has a wide range of application scenarios. For example, the indoor monitoring system for the elderly in the field of smart home can judge the physical health of the elderly according to the behav...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/02
CPCG01S5/0273Y02D30/70
Inventor 陈志刚马文飞陈禄李文
Owner XI AN JIAOTONG UNIV
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