Signal synchronization method used for UWB high-precision positioning system

Abstract

The invention discloses a signal synchronization method used for UWB high-precision positioning system. The method comprises the following steps that: (a) a signal synchronization platform is established, wherein the signal synchronization platform comprises a synchronization controller and N base stations used for UWN high-precision positioning, the synchronization controller is connected with a receiving end of the first base station through a wired transmission medium, and the base stations are successively cascaded; (b) the base stations successively receive and forward a clock synchronization signal emitted by a synchronization signal generation device of the synchronization controller and respectively reset high-precision timing clocks of the base stations; (c) after each base station receives a UWB positioning information code, the clock number of the high-precision timing clock of each base station at the moment is recorded, and the time delay value between any two base stations is obtained; and (d) the time delay value is used as a correction value and is added to the time information of the corresponding base station, and the synchronous timing of the base stations is realized. By adopting the above method, the precise signal synchronization among the base stations is realized.

Description

technical field [0001] The invention relates to the field of UWB high-precision positioning, in particular to a signal synchronization method for a UWB high-precision positioning system. Background technique [0002] High-precision synchronization signal is the key technology that UWB high-precision positioning system must solve. In order to accurately control the time measurement of each positioning base station inside the UWB positioning system, strict and accurate timing synchronization control is required. In the existing synchronous signal transmission and control schemes, dedicated coaxial cables or twisted pairs are often used to transmit synchronous signals, and the synchronous signal receiving port of each positioning reference is directly connected to the synchronous controller’s sending port by a dedicated line, which gives Practical engineering applications have brought great difficulty and cost overhead. At the same time, due to the limitation of the physical a...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a signal synchronization method for the UWB high-precision positioning system, to solve the problems that the current UWB high-precision positioning system has difficulty in synchronization, inconvenient installation, and limited establishment of the positioning network

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