A method for human positioning and tracking with dual-frequency continuous wave radar applied indoors

A technology of positioning tracking and wave radar, which is applied in the direction of using re-radiation, radio wave measurement system, radio wave reflection/re-radiation, etc., can solve the problems of spectrum peak reduction, affecting speed measurement accuracy, and positioning accuracy reduction, etc., to achieve the elimination of spectrum The effect of extension, improving ranging accuracy, and high-precision positioning

CN106199582BActive Publication Date: 2018-06-22湖南超能机器人技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-06-22

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Abstract

The invention discloses an indoor-used dual-frequency continuous wave radar human body locating and tracking method comprising the steps that signal Doppler frequency shift caused by human body movement is acquired by performing mixed frequency filtering on receiving and transmitting signals, and peak detection is performed on frequency shift signals; speed difference signals of the areas near the peak are extracted according to a local speed difference compensation algorithm to be matched with a compensation template so that the optimal matching terms are acquired and the original signals are calibrated; phase comparison operation is performed on two paths of continuous wave signals by using a dual-frequency phase comparison mechanism so that movement human body distance information is acquired; and real-time trace tracking of the movement human body is performed through the human body movement speed vectors with combination of a blind point correction model. Compared with the existing indoor-used human body locating radar technology, dual-frequency continuous wave radar is enabled to realize high-precision human body locating through low bandwidth by the local speed difference compensation algorithm, and the algorithm complexity is low so as to be more suitable for real-time trace tracking.
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Description

technical field

[0001] The invention belongs to the field of wireless communication, and more specifically relates to an indoor dual-frequency continuous wave radar human body positioning and tracking method. Background technique

[0002] With the development of wireless signals, location-based services (Location Based Service, referred to as LBS) have been widely used, and mobile positioning as the main technology has received extensive attention. There are endless positioning awareness technologies in the positioning process, mainly including: radio frequency identification technology, bluetooth technology, ultrasonic positioning perception, WIFI, etc. Mainly through the strength of the received signal combined with the indoor propagation model, the received signal strength (Received Signal Strength, referred to as RSS) is converted into a distance to determine the distance, so the requirements for the indoor environment are high, and the reflection of multiple objects wil...

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Embodiment Construction

[0058] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0059] Such as figure 1 As shown, the present invention is applied to the method for indoor dual-frequency continuous wave radar human positioning and tracking comprising the following steps:

[0060] (1) Obtain the human body reflected wave signals emitted by the two signal sources and reflected by the human body, and perform frequency mixing and filtering on the two human body reflected wave ...