Wireless positioning time synchronization method and device, equipment and storage medium

A time synchronization and wireless positioning technology, applied in synchronization devices, wireless communication, time division multiplexing systems, etc., can solve the problem of unmanned swarm system inapplicability, and achieve positioning and timing, high-precision signal arrival time estimation Effect

Active Publication Date: 2022-08-02
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current DSSS technology is limited to low-speed communication systems or "Gaussian-like" environments with simple and clean channel environments, and is not suitable for unmanned swarm systems that are widely used in aerial photography, reconnaissance and other fields

Method used

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  • Wireless positioning time synchronization method and device, equipment and storage medium
  • Wireless positioning time synchronization method and device, equipment and storage medium
  • Wireless positioning time synchronization method and device, equipment and storage medium

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Embodiment Construction

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0047] The embodiment of the present application discloses a wireless positioning time synchronization method, which is applied to a receiving end. See figure 1 As shown, the method includes:

[0048] Step S11: Receive the target transmit signal generated and sent by the transmitting end after passing through the shaping filter, and use a matched filter to suppress out-of-band interference in the target transmit signal to obtain an initi...

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Abstract

The invention discloses a wireless positioning time synchronization method, device and equipment and a storage medium, and relates to the technical field of wireless measurement, and the method comprises the steps: processing a target transmission signal transmitted by a transmitting end, and converting the target transmission signal into a frequency domain to obtain a frequency domain signal; performing cross-correlation by using a local pilot symbol sequence and a target pilot symbol sequence created based on a constant envelope zero autocorrelation sequence in the frequency domain signal to realize integer symbol periodic signal arrival time estimation; a time delay difference model constructed based on an integer symbol estimation result and a target pilot symbol sequence is utilized to realize decimal symbol periodic signal arrival time estimation, and then the integer symbol estimation result and a decimal symbol estimation result are utilized to perform time synchronization. According to the invention, through the optimized pilot frequency symbol sequence, not only can the integer symbol arrival time be estimated, but also the decimal symbol arrival time can be estimated, so that high-precision signal arrival time estimation is realized, and the system simultaneously meets the application requirements of positioning and time service.

Description

technical field [0001] The present application relates to the technical field of wireless measurement, and in particular, to a wireless positioning time synchronization method, apparatus, device and storage medium. Background technique [0002] Accurately measuring the distance between nodes is a necessary condition to achieve relative positioning between nodes in the network. According to the principle of radio ranging, the distance measurement value is equal to the product of the difference between the signal arrival time and the signal transmission time and the speed of light, and the signal transmission time can pass the time. It can be calibrated by stamping, and the arrival time of the signal needs to be analyzed by the time synchronization method. It can be seen from the above that the resolution of the time synchronization problem directly affects the positioning accuracy. Therefore, one of the core technologies of the radiolocation system is to achieve high-precisio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04B1/709H04J3/06H04L25/02H04L25/03
CPCH04W56/0065H04J3/0638H04J3/0608H04B1/709H04L25/0228H04L25/03159Y02D30/70
Inventor 辜方林魏急波胡晨骏侯茂斌刘潇然赵海涛
Owner NAT UNIV OF DEFENSE TECH
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